Any of these:
  1. SCH - Mentioned before, its weapon and several actions are shared with SMN or outright inferior to SGE actions, and the faeries are glamours now.
  2. AST - Bloaty, one-dimensional cards, weird level scaling (also mentioned before, its heals in Holminster Switch are a joke compared to SGE for instance)
  3. BRD - Remember when the songs sounded cool? Just a bunch of ideas mixed together and a lot of old actions that had their identity scrapped.
  4. SMN - Nothing interesting about the job now. Don't see how it was hard to use in ShB either.
  5. CNJ - Water magic is supposedly an important part of the lore and its absent now.
  6. MCH - Could do with an interesting addition akin to its old ammo, especially with all the balance complaints. The Queen is boring and spends half its duration winding up. The flamethrower sucks and blows.

SCH and BRD were probably bound to have these issues the moment they were tied to ACN and ARC (glad I didn't mix those up).