There is nothing wrong with Mages other than they don't have easy mode anymore. I am a THM and CON main and i think the changes are very good.

"Reduced to Cure bots?" ~ I think you are just a bad THM / CON. Healing is not only about casting cures. I see plenty of THM and CON complaining and at the same time not using bio/slow/paralyze to reduce overall damage on party members.

If you can't manage your MP thats your problem. If you want easy mode then i think you might want to take a break or go to a different game.