I really don't see what the big deal about their age is as long as they play their respective ages in the movies. Now if they were setting Episode VII five years after ROTJ and they were trying to pull of Han, Luke, and Leia in their 30's, then I would understand everyone's anger. But it sounds like Episode VII will take place 30-40 years after ROTJ, and Han, Luke, and Leia will all be in their 60/70's, so it won't look ridiculous at all on screen.