An idea that I can see being extraneous, but an idea none the less:

Seeing that bridge shot from 005 got me thinking again about a particular aspect of the front of the bridge... it looks like there is a hole or extension above Vader that may extend 12 inchs or more above the regular roof of the bridge.

While I can understand if there weren't viewscreens up front (as depicted), what if some slight light effects were employed to emphasize that open area, which in turn could help give the shot some dimensionality: