It seems daft to me that in this instance this room still has map screens stuck on the ceiling where nobody can get to them and the only things in this useful space on the flag ship are two guys and two surgeon droids.

It should be an active command centre like the one seen in ANH, with maps screens people can get to, alternative displays for monitoring the entire battle and controls, is Ackbar's huge ship being controlled by the four or five chaps in his little blister?

The idea being a bit like when a school gym is being used for an assembly or play.

The gym equipment is folded up against the wall but when it's a gym the seating is removed and the gym equipment is folded out.

Briefing over down go the seats into the floor and down from the ceiling come the map screens and the room is filled with battle tacticians and the like.

Another way of looking at it is thinking about all those speakeasy scenes in films like Bugsy Malone where the tables turn around or flip under the floor and suddenly it's a Bible recital or a charming little tearoom.