Maybe keep the new wampa shots but only after Luke slices it's arm, that way we don't see the creature until Luke does.
I don't believe the compositing of the two Tie's crashing into the narrow walls from the asteroid chase was fixed.
If you keep the new shot of the Falcon flying through the Cloud City to the docking bay, is there any way to make it look less flat and uniformly sharp. (with more light or shadow) It wasn't a bad idea by Lucas but the CG is just too obvious.
If you keep the Cloud City flyby after Luke leaves Dagobah, be sure to make the music match up better to the original version. It sort of stops in the middle with the new scene.
As for Ackbar photoshopped to yell "It's a trap." In the real scene, doesn't Luke walk into the same door that Leia and Lando do? So why do they end up in different places. I don't know if this is a goof, it's just something that's always confused me.