I know you just did the color correction, but would it be possible to make the Star Destroyers a little more blue-gray (or at least take the brown out) to better match with the Executor? I'm not saying make them THAT blue, but as it stands, they are pretty brownish.
Regardless, here is something to keep an eye on.
http://www.youtube.com/watch?v=yws5hO89l3U&NR=1
(1) at 0:35, they show how the first shot of Leia seeing Han enter the command station is flipped (putting her on the other end of the room from Han) and then the other 2 shots are presented correctly, putting her back on the opposite end of the room. is there any way you can "unflip" the first shot to keep the consistency?
(2) Also check out 4:23 and 4:50 for more Wampa action!
(3) You will also want to keep an eye out for some of the matte shots where the live action doesn't mesh well - such as 2:10 to 2:13 here: http://www.youtube.com/watch?v=isRZxiDiH58
(4) In regards to Imperial fleet shots, you could stand to add more ships to the shot at 0:35 and 0:44 here: http://www.youtube.com/watch?v=yrrZrVav1i4&NR=1
(5) You may want to have the snowspeeders lift up a little as well as move forward so they don't look to much like they are on tracks from 1:42 to 1:50. I guess another idea would be to animate the pilots inside the more distant snowspeeders, maybe do something with the men inside the blown-up snowspeeders (like Rev's when the cockpit gets blown off and we can see the full body of the pilot - maybe put in some arms shielding the face or have the body get sucked out of the cockpit?)
(6) And I'm guessing you will add a red tint to 2:52 to 2:56 (the AT-AT control room with Gen Veers)?