But I have said from the first time I learned that there were people who hated the SE: Yes, some of the changes are unessisarry, but NONE of them "ruin" the movie.
The changes that I like.
The pan back to see Mos Eisly.
Han stepping on Jabba's tail. It almost makes up for Greedo shooting first. Almost...
The new shots for the Battle of Yavin. Then again, the old one may be better. I've never seen it.
The cleaned up speeder fight on Hoth
I liked the Bespin Exterior shots, but some of them aren't good, like Leia in the window.
General cleaning up of the ancient effects. I doubt I could watch the original version without be distracted by how fake the space battles looked compariatively.