I don't mind the addition much. Infact I can't wait to see the 3D versions of each movie and what Lucas does to touch up the series. I wanna see the CG in the prequels over hauled and improved. Phantom Menace was a leader for its time but the CG is dated now and I think it needs to be improved. Honestly I love all six films and don't understand how some people can be so upset.
I've been a fan since I watched the films, I have the origional's on VHS in their origional form before Jaba was a giant slug. Back when he was a man. Honestly I don't think Lucas's additions have harmed the series at all.
I will not be buying this on BluRay simply because I am 100% positive that the 3D versions will have enhanced CG and touch ups that will make this version obsolete. I can't wait to see what the series looks like after it has been remastered in 3D!
IMO, one of the biggest problems with computer generated graphics in movies is that they are used far too heavily and the movies end up having effects that don't age well ... I have noticed that the movies from the 1990s that used conventional set-building, animatronics and other effects and used computer generated effects where appropriate actually look better than a lot of newer movies that used CG heavily. On top of that, when interacting with puppets/animatronics the actors tend to give far better performances which helps the audience ignore the problems with these effects.