Not sure if we as viewers need to see the fall and turn of Anakin - maybe the focus would be better on other characters ?
it would be interesting to show more of the duality of Anakin and Obi-Wan ... the whole love affair doesn't really pay off :-/
on another note, I think the revelation of Palpatine/"Sidious" should only be in Episode III, let Dooku or Maul be the main "villain" of the other movies ...
I also thought about the "Boba Fett / Bounty Hunter" discussion from the ESB:R thread - it would be good the wipe either the name complete or just leave "Jango" (as a reference to spaghetti western), and name him only "bounty hunter" in the OT!