The only changes I cared for were the cell block perspective being fixed and the change of the Ewok celebration music at the end of RotJ. I always wondered why the cell block corridor ended in a white area, and the fix looks more appropriate. As for the Ewok music, I never liked the "Yub Yub" music, even as a kid. I think the newer music fits better (NOT the added CGI bs, just the music), and the editing to incorporate it was also well done. Apart from these, none of the changes actually improve the films whatsoever. I did not include error corrections, since they are not really alterations, just fixes of past mistakes. I know everyone has a differing opinion on this subject; these are just my personal views.