The demographics for today's tv is a lot younger than I am so the actors would have to be perfectly beautiful and as little imput into the storyline as possible by anyone over 30.
Personally, I think I would find that a pretty boring Collinwood :- . For me it has to be a normal mix - from pre-teen David to the reincarnation of Mrs. Johnson and Ezra Braithwait(sp?). Sure, the biggest part of the cast would be young and beautiful - just as they were in the original. But the kiddies and the old hags, bags and coots have their place too - if only for contrast.