Your latest clip is very impressive. I've got some comments:
Tantive IV is looking nice. Great colors. The blinking lights on Vader's chest are subtle yet awesome!
When the escape pod is launched, can you add a slight spin to it? It spins in all the other shots.
Some have complained about the shot with the twin suns as the pod heads toward the planet and enters the atmosphere. I have absolutely no problem with anything in this shot.
I agree with others that the added rocky landscape for R2 is a bit much. If you can maybe remove just that stupid TPM "bridge/eye of the needle" structure, I think you'll be in business.
Flipped footage of 3PO: I never had a problem with the flipped footage in the first place. Now that you've flipped it back the right way, I suggest you flip the following shot with 3PO next to the Krayt dragon bones to maintain consistency in direction. However, this will require a new wipe to the canyon scene.