I wouldn't mind one bit if Cyclops went back to that look. It's all sorts of classic.
Iron Man, however, should never ever wear the classic suit again even though by it's very name, it is classic. Back when he put it on for an extra special occassion, it was sort of charming but now that a special occassion includes any time a new movie comes out, every event comic written by Bendis, or anytime a new writer comes on board the book, it really needs to be retired for a good five, ten, forever years.
Besides, there was an actual story reason for him not returning to that suit. It was the armor he wore when he fell off the wagon. And then it's the same suit he wore when falling off the wagon again.