@Macintosh: I was commissioned a bridge which was essentially a proper TNG version of the refit bridge once, a "what-if" if they could've fully converted it for production of TNG. Unfortunately the commission was never finished so it's half-way done, and at least at the moment I have no intention of finishing it.
@Orbing Master: Thanks! That's a good idea for it too, I hadn't considered it!
@Firebird: It was a matter of cost and the realities of production. They couldn't afford a brand new set given all the other stuff that needed to be built for the pilot, and they couldn't modify the refit bridge too much because it was going to be used for the next movie with the TOS cast whenever that was done. Obviously the latter didn't end up happening, but by that point it was season 2 of TNG and they could afford new set pieces for the battle bridge set and all its many redresses.

@Orbing Master: Thanks! That's a good idea for it too, I hadn't considered it!
@Firebird: It was a matter of cost and the realities of production. They couldn't afford a brand new set given all the other stuff that needed to be built for the pilot, and they couldn't modify the refit bridge too much because it was going to be used for the next movie with the TOS cast whenever that was done. Obviously the latter didn't end up happening, but by that point it was season 2 of TNG and they could afford new set pieces for the battle bridge set and all its many redresses.