first WAMPA attack scene:
(1) just throwing this one out there. Is it awkward that the Wampa is backhanding Luke with his right paw (thumb down)? I remember in someone's alternate edit, they moved the thumb to the top of the hand, so the Wampa would be smacking Luke off with his left hand instead.
(2) this is the main problem with the Taun-Tauns: they have dead eyes that always look straight ahead. When Han gets onto his Taun-Taun to look for Luke, it has the same dead expression in every scene and is again looking straight ahead. Even if nothing is done (or can be done) with the head itself (though I still think an ear twitch or two would give it some extra life), just allowing the eyes to move and look at what is around it would add a lot.
When Luke is swiped off, the eyes could be made larger and have them look in the direction of the Wampa. In the following scene when the Wampa is strangling/snapping the neck of the Taun-Taun, the eyes could be widened to look frightened. Here are some examples:
(3) you may have mentioned this before, but will there be consistency in the Ben apparitions between EMPIRE and JEDI (consistent transparency, sparkly glow or no sparkly glow, etc)?
(4) I know the bacta tank is getting a "red" treatment, but here is something interesting:
apparently it WAS red in some shots.
(5) I spotted another gaffe I guess. When this snow speeder is moving to take off, there is some sort of wire trailing after it. You can see it better when you watch the movie:
(6) in the shot where we first see the AT-ATs on the horizon, maybe you could replace the dots with tiny AT-ATs and connect them to the ground (this would be especially cool for the 720p version).
Also, when comparing the above shot with the one below, the AT-ATs need to be moved more to the right or the background needs to be changed to look like the above shot (there is no hill on the left-hand side)
(7) after watching EMPIRE again, I can see the snow speeders come FROM the mountain as opposed to coming overtop it. While I know you plan on adding more snow speeders in the distance (to further increase the scope), would it be conceivable to add some rebel troopers in the lower right, as well as maybe on trooper in the gun turret waving the snow speeders on? Another possibility being an added trooper in the foreground turning around to see the oncoming snow speeder fleet.
(8) when Veers approaches the shield generator, should we be able to see something of the rebel line?
And lastly (for the moment):
(9) when the MF goes into the "tunnel" and the front lights turn on, could there be beams of light coming out?