Hmm, what?
Morale is good as is , it's the go to stat in pvp, and having class specific bonuses would be horrible specially the ones you mentioned, no one would attack tanks until the rest of them was dead, there's a reason tanks don't use fending accessories in pvp already, and healers and casters totally need the defense boost otherwise matches in wolve's den especially if it game extra damage to dps clases lol, would be even more zergier than they already are.
As for adjustments in morale the only thing i'd like them to do is either 1. Make it matter less or 2. Make it more acessible.