Just wanted to add my 2 cents on this one, before Adywan makes his own final choice.

To be honest, most of the previous comments on this could work out fine, I reckon. There have been good points about how a 'lift' or 'longer, different corridor' in the background could give a different sense of 'isolation' for the 'meditation chamber' room being an unknown distance away from the Bridge.

If Adywan chooses either of these routes, then okay, but I think the existing shot also works fine as it is....if this 'meditation chamber' room is looked on as being supposed to be close to the Bridge, for the purposes of being easily and quickly-accessed by his High-Ranking officers, to discuss any potential activities going on, in person.

I agree with what a lot of Bingowings suggested about Vader's attitude of possibly being seen 'helmet-less' by these underlings, and have no problem believing that at this elderly, corrupted stage in his life, he is not in the slightest bit bothered by whoever sees his actual visage now, and that it does indeed increase the aura of fear around those that do.... (so either all the existing figures can still be left in the existing shot, OR just the 'guard' could be left (and Piett), for a slightly more 'private area' feel)