The problem is, a lot of people seem to almost be against development in the story. The rpequels are about the fall of Anakin, but many people, rather than see Anakin go from a confused but good soul to a bad one, they want him to bad before he even becomes a Sith (hence, things like removing his hesitation at killing Dooku, amongst other proposed changes). Rather than see the benevolent Republic become the corrupt and despotic Empire, they want the republic to be corrupt and broken well before Palpatine crowns himself emperor.

What I think the prequels ought to be is the story of good falling to evil, and making room for the return of good. Thematically, I think that the prequels would be pretty dull if we spend two movies looking at stuff that has already been corrupted, and then in the third one we finally call the duck a duck.