Ooo, I do like the idea of the change to the outside of the door. It doesn't have to look like the it's far from the ships bridge, but just more private.

To take it a step further, being that it's Vader's personal Chamber and he is 'meditating', perhaps we could see guards stationed at the door as a big 'do not distub' instead of a bunch of gawkers.

Even if they [imperial officers] were not looking in, the noise of a regular crowd working outside his [Vader's] meditation chamber door does seem counter productive.