So given all the fresh ideas in the thread lately, I though I'd throw a few of my own out there. I'm sure adywan would consider at least a few of these, and I think they'd really enhandce the ESB:R experience.
When Han and Chewie confront the Probe Droid on Hoth, it's really unlikely that the droid would miss Han so badly, and that Han would hide like a coward rather than firing back. Why not have the droid fire at both of them at the same time, and they could both fire back (but miss due to the extreme cold). Then Luke could ride up on his Taun Taun and slice the droid with his laser sword.
We definitely need more Boba Fett, so why not have him be the one commanding the main AT-AT? Instead of the AT-AT firing a laser at the shield generator, Boba could open the top hatch and fire his backpack rocket at it.
When Luke is training with Yoda, it makes no sense that Luke has to raise R2 with the force, when R2 has jets. Why not add the jets so R2 doesn't look so weak in this scene?
When Luke destroys the Vader clone in the Dagobah cave, it makes no sense that it would be Luke's face in the exploding helmet. Make it Sebastian Shaw's face, or heck, maybe even Hayden's face. He's definitely better looking, so that would be a nice gift for the ladies.
The cave monster that almost eats the Millennium Falcon is too obviously a puppet. Does adywan have a fierce-looking dog? He could film his dog trying to bite a toddler, and then rotoscope it into the place of the cave monster.
Luke's lightsaber should be constantly changing colors during the confrontation with Vader on Bespin, to maintain continuity with the 2004 DVDs.
Han should die at the end. I mean seriously, I know this is a movie, but no one survives carbon freezing in real life. It takes me out of the movie every time.
Thanks adywan!