With all these changes, on top of the ones already made, it would be easier to just remake the movies. That would make CGI-loving, shallow people happy. The lightsaber fight in IV is NOT lame. It's fine as is. And Ewan McGregor is a better Obi-Wan than Alec Guiness? Yeah right.
And CGI DOES NOT MAKE A MOVIE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Yoda looked so much more believable and real as a puppet than in CGI. Palpatine's face in VI was much more evil than the CGI mask in III. The OOT is great because we know its all real. Yoda, the spaceships, the creatures. They were all real, even if they were minuratures, and they looked it too, adding a layer of realism and depth into the OOT. THe prequel trilogy sucked because it did not have the heart of the OT. I didn't feel real at all because of all the damned CGI. If it were my choice, filmmakers would stop putting so much CGI into films, and stick with minuratures and models.
You're entitled to your opinion of course, but just think about the fact that if all these changes were made, they would not be the films that so many people poured thier hearts into.