As someone who plays conjurer and thaumaturge quite a bit, I had to agree with turning off the AoE on cure and sacrifice. An increase in the MP cost though, has made it nearly impossible to keep a party alive. I think what would work best is to leave the area of effect changes in place, and remove the increase in MP cost for cure and sacrifice.

You could also reduce the magic power for disciples of war, and the attack power for disciples of magic. It would eliminate a lot of imbalance I think you were trying to get rid of in the patch. (Maybe a bonus for abilities in your class?)