So many interesting ideas being discussed here lately. As far as Vader's meditation chamber, I definitely like the idea of an isolated hallway leading to his chamber, as it does seem to open up the scope of the ship, as well as isolating Vader even further, and appearing more intimidating. Also, I think it looks better without all the others outside peering in.
In regards to how Vader's helmet is lowered in the chamber, with the front faceplate apparently attached to the helmet as it is lowered, I always felt that the front piece is able to come off, but is not normally intended to. So when Luke tries to remove his helmet in ROTJ, he is sort of just trying to figure out how to remove it, and sees the clips that would release the front faceplate, and unlatches it, whereas maybe in Vader's meditation chamber the entire mask is normally removed as 1 piece. Just a thought.
Monroville, I really like your idea about the Taunton's eyes. Just the mock-ups you provided seem to add alot more life to them, and I hope Adywan considers it.