In the end the alterations are a double-edged sword. Some can enhance the movies, others don't matter, and some make things less effective. Even if a change makes things better, there will be people who don't like it. All things considered there is one thing that validates changes to Star Wars for me. At the end of Return of the Jedi, once the good guys have won, it cuts to three different planets all celebrating the defeat of the Empire before settling down on Endor where our heroes are. It's as if, while they celebrate their victory, the entire galaxy celebrates with them. I mean come on, it's the party across the galaxy! How awesome is that?! And you know something? To my knowledge it wasn't in the original version of the movie. If anything that scene proves that something good can come from changes, but then again, maybe that's just me.
"A sinister cabal of superior writers."