A curious thing is how the OT is commonly thought of as being "by George Lucas" even though this is hardly the case. I don't know whether that misconception got any stronger with the release of the SE's. And yes, Empire really does have the least amount of actual changes made to it (aside from fx cleanups) and I wonder how much Kershner had to do with this, be it his original good directing of the movie in the first place or the fact that he was still alive in 1997. Star Wars '77 was arguably Lucas's own movie (he directed it). It's the only one that he was anywhere near justified in being able to alter. Jedi, on the other hand, would've been better left alone. Not only were the changes made to it on the whole quite bad, but the film's director was deceased by that point.