I'm not a big fan of dropping the episode #s. If the Revisited edits were designed to be a stand-alone trilogy I'd maybe think otherwise, but I've always felt that, being special editions, part of what they do is bridge the gap with the PT. As such, I don't see the point in dropping the episode numbers, since we're not necessarily trying to avoid having them work with the PT. Besides, I've always liked the roman numeral designations in the Star Wars movies... it makes them feel like chapters in some ancient tome.