Lucas does have good ideas once in while. It's the execution of those ideas where he gets into problems. Removed from the pressures of wearing too many hats as he did on the prequels, and not being surrounded by yes men, the good ideas will hopefully be nurtured. Maybe more like the production of Empire was, but less stress for George.

Disney plays at fostering/encouraging a creative environment. It may not actually be that way, but having the creator of Star Wars on board is good P.R. They don't want to look like they bought Star Wars to do with as they damn well please, and George doesn't want to look like he sold out.