I've got a few ideas. I always thought it would be neat if a few rebel fighters crashed into the death star shield when they all pull up right before the battle in ROTJ (like they originally planed). Also, as I'm sure many people know, Vader is holding Luke's lightsaber when he taunts luke (when Luke is hiding). Instead of digitally erasing the saber in Vader's hand, I've always wanted to see the saber fly out of Vader's hand (assuming that Luke retrieved it with the force). Unnecessary, I know, but I've always thought it would be cool. It would also be cool to see gunner stations inside the death star (like originally planed, or at least toyed with). Maybe cloned elements from Episode IV could be used.

Something that always bothered me in ROTJ is a big black matte that covers half the screen when Vader is kicked down the stairs during the lightsaber duel. Its at the end of Vader's fall, right before the cut to the next shot. I guess it was done to cover up a crew member or some kind of goof. I always thought Lucas should have fixed whatever goof was there originally for the special editions, without covering half the screen. It would be cool if the actual background (what should be there) was matted into the shot to replace the black area.

Well, thats all I've got for now.