Everyone gets older. The only other option is to die young. I'm sure a senior citizen Captain Solo will be just as surly and wisecracking as a 30-year-old Captain Solo was in the first film.
I agree, I hope the next films are more like the originals than the prequel trilogy. I like the prequels, but I love the originals. Having the big 3 back will be great, I think. I hope they can get some of the others too. I'd love to see Billy Dee Williams back as Lando and Denis Lawson back as Wedge. Wedge was a somewhat minor character in the movies but he became big in the expanded universe. (Rogue Squadron commander) And, of course, nobody can play C-3PO but Anthony Daniels.