During the Luke/Vader figth when Vader knocks out Luke's lightsaber and Vader is advancing on Luke, who is just on the edge of the freezing chamber, it is not clear whether Vader swings the lightsabre with intention to hurt Luke, or is he just making a force gesture, to push Luke into the chamber. The later seems more logical, since he want's Luke alive. I would be better to se the force gesture more clearly, Luke at the edge and Vader force pushing him into the chamber. I know it's not a big deal, I just thought I'll mention it.
BTW, the new clips, asteroid chase and Yoda are great, though as many have suggested, giving some movement to Yoda's eyes would really make him even more lifelike.