I'd like to see the Shaman and Sorcerer redone. Both these classes have a lot of fiddly bits and I would like to see simpler versions of them. A version of Shaman without the spirit companion would be interesting to see, that thing is a bit of a pain. A version of Cosmic Sorcerer without all the moon phases to keep track of or the tedious bonuses a Wild Sorcerer gets based on random rolls could be a breath of fresh air.
I also wouldn't mind the Barbarian redone, for no other reason than the general public appeal for the class as a "simple to play" charge and bash things mentality. The current Barbarian builds are not near durable enough for that mentality of play. They need to be played more like a surgical missile, not a wrecking ball you throw in the middle of the field. A new wrecking ball design that can withstand less strategic thought would probably be beneficial.
I also wouldn't mind the Barbarian redone, for no other reason than the general public appeal for the class as a "simple to play" charge and bash things mentality. The current Barbarian builds are not near durable enough for that mentality of play. They need to be played more like a surgical missile, not a wrecking ball you throw in the middle of the field. A new wrecking ball design that can withstand less strategic thought would probably be beneficial.