So I put together a sound effects suggestions list of which some are my own and some suggestions other people made. And it has nothing to do with officially listed differences between the special edition and the theatrical cut which you can find here but this is probably inaccurate.

http://en.wikipedia.org/wiki/List_of_changes_in_Star_Wars_re-releases

1. Make it so storm troopers are no longer mute. There is only one line of Storm trooper dialogue in ESB give them there cool sounding voices back and make it more like ANH and ROTJ

2. When Vader and Veers have a hologram conversation. Add the sound of the Hologram shutting off sound after the conversation ends before "prepare to target the main generator".

3. Add a few Blast hit sounds while Han and Chewie try to fix the hyperdrive during the asteroid chase It would also clarify the difference in sound when they get hit by an Asteroid and when Han says "That was'nt a Laser blast" while keeping continuity that they are still being chased

4. Enhance Dagobah's ambient forest / swamp sound effects there is quite a few quiet moments where it could sound more "Alive" yet only subtle non intrusive and not interfering with dialogue additions.

5. Vaders Light sabre striking the floor when he swings and misses Luke in carbon freezing chamber

6. Special Edition Slave 1 Engine sound effect rather than Theatrical (not on list)

7. In cloud city when Lobot walks up the stairs past Lando and co his head band flashes but there is no activate sound. Before the trap is sprung this sound could be heard again when chewie looks over his shoulder to convey lobot double backed to spring the trap.

8.Add distant sound of tie fighters while luke is hanging under cloud city but not on any scenes with dialogue only when he is looking around.

9. The device leia is trying to turn and lock into place before Han snogs her seems to have the catch the other side of the set wall while the boom mic was in the area with the actors. The noise of the equipment sounds hollow when trying to be locked in suggest to make a more fuller sounding metal hit sound on the attempts to lock it in. And a click when it does lock in to place and Leia hurts her finger.

10. Remove Wampa groan sounds so that Luke wakes up naturally upside down. Sasquatch and yeti are always shown to be quiet creatures and the Wampa is based off of these mysterious probably hoax animals yet the characteristics match when he attacks Luke on the taun taun but once we are in the cave the Wampa cannot stop constantly yelling and wailing for no apparent reason. They are meant to be stealthy in nature but I think the Wampa yelling in pain when hit by a light sabre is a worthy groan sound here and perhaps when he emerges but otherwise think he should be muted to improve the scene.

Not asking for any of these to be implemented but I think this is pretty much all the sound effects suggestions I can remember and think of and handy to perhaps compile. And a fairly reasonable list