The big problem with A1GP just having a one design car is....its a one design class. It might bring out the best driver, more likely it will bring out the best set-up team. The "reason" for racing is not just to provide an entertainment, although thats a big part, but to improve the technology. That can't happen with a one design class. The big problem with classes being developed under rules is that nowadays you get designers who find the limits of the rules much faster these days. The result is dominance by one manufacturer over a few years until either the rules get changed or someone finds a really cunning way to cheat, wen either everybody does the same cheat or the rules get changed. Again.
Scumby coming back/staying away, dumb dictatorial series and team managers in F1? Who really cares? Does it actually matter? Its all getting like the telly wrestling when it got the really talentless scriptwriters.
I think I'll stick with the Moto GP and other bike racing. At least theres real racing going on. A pity about the amount of electronicery that has to go on, but still, it is an entertaining circus with more actual action than talking heads.