I like CG yoda in TPM and the blinking Ewoks, although seeing as TPM is my least favorite of the saga and I always thought the Ewoks are silly, that's not really the biggest of consolations. I hate the new audio stuff they added, and if anything I was hoping that Lucas would listen to some of the criticisms and change back Boba Fett's voice (speaking of which, does anyone know if they still have the phoned-in overdub in there?), but instead we get an even sillier Kraayte Dragon scream and Darth Vader's "NOOOOOOOOOOOO!" now ruining the ending of ROTJ. It sounds like Lucas was more interested in tweaking the artistic aspects of the film to suit his more recent tastes than he was in actually cleaning up the film, because I hear that there are still plenty of color errors all over the place.
My room mate is picking up his copy of the Saga tonight, and we're going to have a marathon of the whole thing so I will have a chance to see for myself what has been fixed, and what has been meddled with. I am actually a bit of an apologist for some of the "enhancements" Lucas has made over the years, because I am all for making the movies look prettier-- as long as the original version is still available, and Lucas is only fiddling with things that there was no money or technology for originally, and not compromising the artistic choices of the original version. To me, inserting CG ships and making the creatures look more alive is an "enhancement," but having Greedo shoot first or replacing actors is changing, and changes really boil my butt because they are undermining the original artistic intent instead of enhancing it.
The Blu-Ray still does not have the original versions of the films, and Lucas has made even more daft changes, so I'm not exactly in a rush to go buy it (my current financial situation doesn't help either, though). If anything though, hopefully we'll get a Blu-Ray version of ROTJ Revisited now that a low-compression 1080p source is available.