You’ve definitely nailed it sade. I remember even as a kid thinking Anakin’s statements about the Jedi being evil didn’t track. Lucas was obviously combining disparate elements and not meshing them together well, or fleshing them out. I think a lot of us feel the same way, but it can be good to lay it all out like that. The question becomes how can we take what we have and improve in in a fan edit. I know Hal’s take, for instance, is to reduce the prominence of Padme’s potential death, to make it merely the tipping point for Anakin (rather than the primary motivation).
My approach is moreso to take what’s already there and just sand down the bumps, so to speak, with the goal of trying to emphasize that it’s a matter of loyalty between the chancellor and the order. For instance, one change I implemented that I haven’t seen anywhere is simply removing Anakin saying he’d like to kill Palpatine. That way, even though Anakin turns him in, he’s just doing that because it’s what he’s supposed to do as a Jedi. It’s definitely the kind of change I suggest for anyone else doing an ROTS edit.