I think http://www.slashgear.com/how-lucas-ruined-star-wars-and-how-to-save-it-3095953/ makes an interesting point when he talks about how all the actors in the prequels had already seen Star Wars. I don't remember seeing that critique anywhere else.
*sigh* These movies just should never had been made. Like redlettermedia pointed out - this was not a story that needed to be told.