Immediate gut reaction is hands off and fix the mistakes you have done to this, then I stopped and wondered how could they make it better, what would enhance it, these points are the ones I came up with.
1) First thing that should be altered is the who shot first, Han shot first it's that simple.
2) Take out all the stupid little sound effects and put the original sound effects back in (I.E. Ben's Krayt Scream is not frightening its annoying).
3) Make the Space Battle at the end bigger, dont alter who goes into blow the Death Star Up, but who is actually tieing all those Tie Fighters and other Imperial Ships up while the Trench Run is happening - There is supposed to be a Blue and Green Squadron show them, they dont have to be taking part in the big battle with the Death Star, because it would be their job to tie up the Imperial Ships.
1) Put in the scene with the Wampas and Snowtroopers, also the Ice Laser.
2) Change Boba Fett's voice back to the original.
3) I was going to say take out Luke's Girlie Scream.
1) Leave the Ewoks Alone, repeat do not touch these guys.
2) Put back in the Original Song Max's Band performed.
3) Put the old Ewok Song back in.
4) Make the Battle Bigger at the end.
5) Put back in Shaw at the end, because thats the biggest crime commited against Star Wars in any of the Movies.