Episode III should've been split up into 3 movies, and that could've been the entire trilogy right there. As it is now, we got two movies that are basically nothing but filler and then all the really important stuff got crammed into the last one. Nothing much happens in Episodes I and II that we really need to see. But so much important stuff happens in Episode III that there's not enough time to develop everything. The prequel trilogy should've took place entirely during the Clone Wars. The movies only showed us the very beginning and the very end of the War. And that's what most people wanted to see!