Here is a thing id like to see with the new AP system: screw cooldowns.

Since you cant play Ap tetris anymore, i see no reason for cooldowns on many of the combat spells.
Its already a descision wether or not you play a powerfull spell or a weak one, rather in in Original Sin 1 where you would always cast the powerfull ones if you could get away with.
Plus the source point system that already manages the REALY powerfull spells.

So imo, the cooldown mechanic is just a restriction that doesnt need to be there anymore.