I think the changes to the owlbear cub is fine, because I think it was never intendet that one class profits more from the cub than other. Since the rework of the owlbear the SW was the last class, which Encounter multiproc his effect. That this update hurt you so much is a bad side effect of a good change. Sorry for my…
A possible solution may be, that the target cap is removed. To prevent the behavior of clearing the whole dungeon in one fight, the devs can implement a buff to the mobs in dependence of the number of fighting mobs. So a small group of enemies has no buffs but a big one can wipe the party.
Rethink the equip-bonus of the 500il-armor for tanks and dot-based classes, pls. it may be difficult to reach the 15% maxTP treshold in one single blow for this classes.