The classes that need a buff are:

ninja: aoe is garbage, (being fixed in 3.3) single target could use a slight buff, they are mainly a utility class though.
bard: horrible single target, mediocre aoe (better than nin) utility is almost useless with the content being steamrolled at the end of this patch.
Drk: Bloodweapon is usually useless because it can't be used with grit, really bad design for blood weapon.

those are all the problems I honestly see right now, things aren't that bad, but these issues need correcting, like, yesterday.