One thing I'd like to see looked at is the amount of wobble in Vader's moves (especially when strangling the Rebel guy).
I'm not saying that being Vader is a wobble free life style but it does distract from the general might of the guy to have him seem to strain like that.
I imagine the armour in ESB was a bit lighter because Dave seemed to have a real problem getting around first time around.
Back to the red, the Empire really did go to town on that room :