As far as TPM goes..that I didn't like so much. I liked some of the IDEAS, but I'm not so sure magnolia's creative decisions there were really any better than Lucas'. The major problems with TPM can't be fixed with editing. you need to reshoot/recast. There's only so much you can do.
And aside from the Radio Dramas--nah, never really thought about re-editing Star Wars. I pretty much like em how they are, and what I don't like, I just fast forward past. I don't think I've watched ANY star wars movie all the way through in about 3 or 4 years. Even the original trilogy. I just kinda skip around. I find myself so familiar with these films that any slow points just seem to drag out THAT much longer. So I basically turn every viewing into a Star Wars Greatest Hits mixtape
I once helped write up a VERY extensive list of shots and cuts that you could make to edit Matrix Reloaded/Matrix Revolutions into one 3 hour movie, but never actually followed through with it--but i'm sure a couple other people have. Hell, I had fun just debating/brainstorming about what the cuts would do and what things we had to keep even if we didn't like them because removing them would weaken parts later on. Stuff like that. It became less of an excercise in editing and more an exercise in puzzle solving.