AEDU + rituals worked better for casters than any other class in 4E. My issues are with poor execution not concept. Rituals could be so much better than they are. Spells and several general concepts about magic need to be revamped. Bring back the power level of spells and magic from 3.x, bring back summoning, polymorph, hold, prison, etc, the spells in 3.5 were like the pinnacle of the best spells list in all of rpg history, and 4E scrapped like half of it. Bring them and the neutered magic items all back.