I think it's pretty simple what can change

War needs AOE healing removed to be balanced, also remove regen healing from Shake it off, regen can go off equilibrium as well quite frankly.
PLD needs a tiny bit less healing, I've mentioned before Removing the Magic attack healing and putting *some* of that in another skill such as a way to make clemency OGCD or something.
DRK could use a tiny bit more in AOE, such as making DM have some physical (like 10% while being 20% magic) and giving them some small sustain. (Nothing on par with warrior or even pld, im saying small sustain for a reason).

I think the biggest issue is warrior, As you can't balance having bigger harsher pulls while warrior is in their current state, I personally want to feel more on wall to wall, I want it to be a group effort instead of something i barely think about.