What do you mean? Vader's suit notably changed in every movie so far. The eyelenses in the OT are rounded for instance while those in RotS are flat. RotS helmet is symmetrical, all OT-helmets are asymmetrical. And so on. I don't see where RotS implied he was in the same suit for all his life. As for 2 creative consultant Lucas has no more say on canon. Filoni now needs Kennedy's approval, not Lucas'. I would find it interesting to see however how he adapts to life in the suit. It is only realistic that he would have some problems in the beginning.