Seriously though, this stuff could go on forever, no matter what is added in or redone there would be other people saying this or that more could be done.

That being said, there is one thing that could be done to remedy the scene of Han stepping around Jabba without stepping on his tail. It would not be easy to do and it would be a long shot (further away) could be shown with Han walking to the place (Using a stand in) he is right after he steps on Jabba's tail without going around him. The whole hanger background would have to be created again, this is something likly only ILM or another big effects house has capabilities to do, I am kinda surprised is wasn't thought of.