I didn’t think Lucas could do worse than having Greedo shoot first, but he did: Sebastian Shaw was replaced by prequel actor Hayden Christensen as Anakin Skywalker’s Jedi spirit at the end of Return of the Jedi.
The rationalization I’ve been hearing is that a Jedi spirit is his “pure” manifestation, and that Anakin is being shown as he was before he became Darth Vader. But I’d argue that Vader managed to redeem himself by killing the Emperor and saving Luke, and even young Anakin in Attack of the Clones was beginning to show the angry, authoritarian tendencies which would later lead him to the Dark Side.
(Hmmm. It just occurred to me: now I know where Luke Skywalker inherited his whiny “going to Toshi Station to pick up some power converters!” voice.)