That's true, but it was also deliberate. Gary was intending with the cavalier (and similarly with the acrobat, and the other classes he mentioned in Dragon magazine but was never able to detail, like the mountebank and jester) to expand the scope of the game beyond the dungeon- and wilderness-crawling of OD&D, to include more in-town activities and interaction with the civilized world. Most D&D characters exist apart from, or at best on the fringes of, "normal" society, but cavaliers are required to be a part of it. They're not independent free agents the way other character are.
Some people don't like that, and want their characters to be free agents, so it's natural that this class, with its explicit social status and obligations, won't be appealing to them. That means that adding cavaliers (and the other "town-oriented" classes) makes it more incumbent that everyone be on the same page up-front regarding what the campaign is going to be about so that there aren't incompatible characters or resentful players who expected one thing and got something else. But that's part of the larger trend in how the game was growing and changing in the 80s (and the unfortunate coincidence that the growth was piecemeal and not explained (and ultimately incomplete) so that a lot of people didn't understand that it was happening and spent a lot of time trying to shove square pegs into round holes) of which the cavalier and acrobat are a symptom, not the cause.
I mostly do like the cavalier class and think that it fills an archetypal niche that is distinct from the soldierly "fighting man" just like the barbarian does, and - when the role is understood - that it works fine in the AD&D game, especially in a campaign where the players have a stable of several characters that they rotate between depending on the nature of the adventure.
The various advantages given to the class, including things that seem like they should (or at least could) also have been given to other classes like special parrying and ability score training and multiple weapon specializations and the ability to keep functioning with negative hit points, make sense, given the core conceit that unlike common men-at-arms (i.e. fighter characters), cavaliers have undergone intense, specialized, high-quality (and very expensive!) training and conditioning since birth. This is perhaps made more clear in the Dragon version, which includes some text that was rephrased or edited out of UA:
[T]he cavalier character must be of the correct social class, i.e. gentle or noble birth, or of the accepted aristocracy for candidacy to knighthood. This requirement usually means that the character must be of a knightly, noble, or royal family which has suitable financial means to support the training necessary for entrance to the class of cavalier.and
Landless aristocrats (knights or nobles) are typically precluded from having a child immediately enter the cavalier class at 1st level, since they are unable to afford the training and equipment needed. Such families (as well as lesser families being particularly honored) might, however, be allowed to have a child candidate enter the cavalier class as a 0 level horseman retainer of a knight.Cavaliers in AD&D are, by definition, either rich kids or kids who've been adopted and sponsored by rich patrons. They are explicitly the privileged "1%" of AD&D characters, and that gives them advantages that other characters of humbler means simply didn't have access to. "It's not fair that cavalier characters get to improve their ability scores through training and other characters don't." Exactly - it's not fair at all. That's the point. The whole concept of the cavalier class is completely unfair and non-egalitarian, by deliberate design.
And, at least in a properly-managed campaign, those benefits don't come without a steep price. As noted above, cavaliers - at least at low to mid levels - are not free-agent adventurers in the way other characters are. They have strict social obligations that must be obeyed and maintained. Again, this is made clearer in Dragon #72 than in UA:
As stated above, service is the paramount requirement for assumption of cavalier status. This service can be to a deity, state, order, or any master, particularly one of high station. After attaining knighthood [ed. note: at 4th level - this isn't explicitly stated in the text of either Dragon #72 or UA, but it's strongly implied by the level titles and supported in context], the cavalier can renounce former service, of course. At such point, the cavalier then champions a creed or cause, or is simply a rogue. In all cases, social status is likewise of paramount importance, and this must be maintained.Note also/especially that "if the order or liege lord of the cavalier demands it" the character can be forced out of the class, becoming a fighter and losing all cavalier benefits (except weapon of choice). That's something that I suspect gets overlooked and ignored a lot, but it seems very important to me as it's unique among all character classes - paladins, rangers, and monks lose class abilities if they violate their alignment, and clerics are subject to judgment by their deities, but the cavalier alone has their class abilities subject to the whims of an earthly patron (typically an NPC, but at least theoretically another PC) - if you don't do what your boss says to their satisfaction, at their discretion, you lose your class abilities.
The cavalier's required body of retainers also worth paying attention to. Starting at 4th level the cavalier must acquire at least one lower-level cavalier retainer, and must increase the size of their retinue as they increase in level, to a total of 6 (3 lower-level trainee cavaliers and 3 0-level servants) by 8th level. The cavalier "is responsible for the actions of his or her followers and retainers, and is required to insure that others of the cavalier class live up to the standards of the class," and is also required to always travel with this substantial retinue until they achieve 9th level, unless their master orders them to travel solo. At first glance this may look like a benefit, but it's actually a substantial burden that characters of other classes don't face. Cavalier characters not only always have to answer to a boss above, they also are responsible for the well-being and behavior of a group of dependents, with no choice in the matter.
Many players will look at all the benefits and special abilities of the cavalier class and be envious of them, but it's a good bet that many of those same players (especially those accustomed to playing "traditional" free-agent adventurer characters) are also very turned off by all of the obligations and would be unwilling to abide by them. And that, of course, is exactly the point. You don't get one without the other. A cavalier without all those burdensome obligations, who doesn't have to answer to an NPC boss and doesn't have to shepherd around a group of dependents and is free to go out adventuring and behave in whatever manner he or she chooses is called, you guessed it, a fighter.
All of that said, while I mostly like the class, I acknowledge that there are some issues with it, just like there are with the barbarian, including some details from the Dragon version (which I think is worth reading - the UA version reorganizes and streamlines the text in a way that is more efficient but loses some of the flavor; plus I like Keith Parkinson's illustrations better than Jim Roslof's) that were left out or changed in UA - presumably by Jeff Grubb and/or Frank Mentzer - that I think shouldn't have been. Therefore, I recommend the following changes to the UA text:
- Elf and half-elf cavaliers have the same level limits as fighters of the same race [per Dragon #96, seemingly overlooked in UA - and really it only makes sense]
- The activity of the cavalier is such that it precludes any other profession - there can be no multi-classed cavalier or dual-classed cavalier. [per Dragon #72]
- Add battle axe, bec de corbin, pole axe, falchion sword, and two-handed sword to the list of allowed/preferred weapons [all of these were on the list in Dragon #72 and were used by knights historically, so their deletion in UA seems to have a case of overzealous game-balancing overtaking source-fidelity - I smell the meddling hands of Grubb or Mentzer!]
- Add falchion sword as one of the options for the second weapon of choice [also per Dragon #72]
- Add composite short bow as an option for the second or third weapon of choice for elf and half-elf cavaliers. Such characters have an increased rate of fire (3/1 at levels 6-10, 4/1 at levels 11+ (should they manage to attain such)) and are able to employ their full rate of fire even while mounted [per Dragon #72]
- Weapon of choice "to hit" bonus is capped at 17th level (i.e. +3 for the third weapon) [implicit per Dragon #72]
- The Protection from Fear aura of good-aligned cavaliers becomes a +2 bonus to saving throws against Fear-based effects, not a blanket immunity [per me - this effect is just too good as blanket immunity]
- Delete the 90% resistance to mind-affecting magic and +2 saving throw vs. illusions [per me - legendary knights (from Arthuriana, Orlando furioso, Don Quixote, etc.) regularly succumbed to such effects and were constantly being charmed, beguiled, and fooled by illusions. If anything, it feels more appropriate and truer to the source material that cavaliers should have a penalty against such effects than a bonus!].
It almost goes without saying that cavaliers are especially suited to small, one or two-person, player groups and/or to younger players who might be more willing to accept being sent on missions by an NPC boss instead of being self-directed free agent treasure-seekers. Another interesting possibility in a large and long-running campaign would be to have cavaliers as "second generation" characters whose bosses are the earlier (now high-level, retired) adventurer PCs who carved the kingdom out of the wilderness and settled it. The first generation of PCs builds civilization out of the wilderness, then the second generation is charged with defending it.