Ok, I'm not going to go completely through the whole list you made since it is 1 AM, but it has always bugged me about people complaining about the insertion of the Jabba scene. I know, we are all purists here, but of all the changes George made this is one he wanted to do originally. He shot it, it was going to be in the film. Unfortunately, he lacked the technology at that point. If the film were made 10 years later, it would have been there.

Just take that into consideration when you talk about him 'butchering' the film with this scene. Would you have thought it stupid or out of the ordinary if it had always been that way? Probably not. Sure, the suspense of Jabba may be killed but GL had never intended for that suspense to be there.