I've been thinking again... sorry.

A while back I proposed the idea that the circular star map things in the briefing room lower during the Endor battle and the room becomes a functional war room (instead of just a few guys looking at the hologram table).

With the room being circular it might be possible to make a single triangular module (with some monitors, buttons and controls etc) man it with a seated actor in a headset, film it, then rotate it or film it from another angle with a different actor and composite the footage together until the circle around the hologram table is filled with activity.

That way you would get the impression of a massive set redress with just one small prop and a selection of actors.