The lights inside really bring it to life. I bet you could add audio too at some time in the future if you wanted but that always seems like a hassle to me. That's a lot of action figures in the background lol.
Since TNG is not my bag, the action figures interest me only because of the sheer amount.
That Nomad on the other hand is nice.
I still suggest you reconsider adding a voice as Nomad was an intimidating guest.
Maybe go wild and add an IR-sensor and let it go off when someone enters the room.