Here’s what I would correct/keep IMHO:
- Make pointed lightsabers to match the ones in the prequels (and TFA?);
- New Alderaan explosion;
- Make TIE fighters the same color as the rest of the OT;
- Keep “Battle of Heroes” soundtrack throughout Darth Vader vs Obi-Wan duel, since the sequence is fast paced;
- Keep Darth Vader’s BLACk eyes since they’re black in Episode III and the rest of the movies;
- Remove Darth Vader’s reflecting pole flashes in his encounter with Obi-Wan as he approaches saying “I’ve been waiting for you, Obi-Wan”;
- Make Obi-Wan lighting his saber after Darth Vader, since “a Jedi uses the Force for knowledge and defense, never for attack” [cit. Yoda];
- Restore Tarkin’s final shot before the Death Star’s destruction;
- Restore Death Star’s destruction wave.