Victim said:The problem with going with a few core features can be easily seen in the fighter class: too many dead levels. Each level that the class gets nothing makes multiclassing or PrCing much more attractive. So a bunch of minor features can really help keep people in the class. So I don't really see the weak specials the knight gets as being much different than the rogue or barbarian's advancement in Trap Sense and such.
The difference, while not earth-shattering, is distinct. It amounts to polished versus messy design, streamlined versus cluttered. As a DM, I'm much more fond of allowing a polished, streamlined class into a campaign, and I'm certainly going to get better use out of one as an NPC. The knight has 6 different uses of his fighting challenge, plus 3 progressive features (shield block, armor mastery, and shield ally), plus sporadic bonus feats, plus the 3 one-time specials bulwark of defense, vigilant defender, and impetuous endurance (these in particular seem totally gratuitous).
Not only does each new feature have its own little FAQ festering inside of it waiting to burst forth, it just gets to be overkill at some point, reminiscent of those 1e supplemental classes like barbarian, cavalier, and ninja. I don't think keeping the sheer quantity of class features within single digits is all that demanding.
The barbarian and rogue both provide good examples of how to avoid those dead levels without becoming a bloated kitchen-sink full of a dozen different class features.
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