I think the armor system is not good, its basically a immunity shield that works at full power even if you only have a single point in it. Its also tied to main attributes and leveling alone, which are the most important thing in the game at expense of everything else, but fortunately other mechanics make combat good despite that.
Bless certainly should cost more APs too. And have more limited use.
At least in combat you have to move over blessed surfaces to get the benefits, but that costs APs.
It does solve elemental surfaces a bit too easily.
I dont think you can curse or bless ice... so maybe we shouldn't be able to do that to fire either.
But none of that is a fault of the new AP mechanics.