I dunno why he changed it, I believe it was because he wanted to make Han not appear to be a cold blooded murder. though if i told someone they could take my ship over my dead body and they said that they were looking forward to that for a long time i sure as hell would take that as a threat on my life and that their intention was to kill me (especially if they are pointing a gun at me) so i would probably blast them under the table just as Han did.

So all he really did was take away part of Han's character, instead of being a rogue and having one up on Greedo he only fired in response to Greedo being an unbelievably terrible shot. (keep in mind, Han didnt have the ability to aim as precisly as greedo because Han's gun was under the table)

so its just things like that, yeah, the movies are still good, but they arent as good as the Originals. Even the changes that dont change the plot still slow down the flow of the movie. If he's such a perfectionist why doesnt he realize that while not perfect maybe, the OOT was pretty darn close, and was closer than the SE's are. His changes are only dealing with the perfection of the visual representation of the special effects, not with the story as a whole. If he was such a perfectionist then if he didnt think the movies were perfect he should never had released them. What about Lucas' mind set, he couldnt enjoy the movies as they were, as millions of people had done for 20 years before he made changes. I think he hides behind being called a perfectionist as a way to justify the changes he makes to a movie that was perfectly fine.

-Darth Simon