It's bittersweet but I have sacrificed the walls and ceilings of both wings to free up about 100 more pieces. In doing so, the wings have a more open feel to them and the main structure can be viewed by players.
Before, the complexity of the wings was too much for the frame rate to handle, and if the map was viewed from the exterior, the lighting was funky and there was lag. Although the original version had no interior/gameplay lag, I felt the map was complete and deserved the exterior perspective. Instead, I have replaced the walls with very nice aesthetic railings. Because I'm back to 550 pieces, I will fine tune the map even more and add more gametypes; probably Oddball and KotH. If anyone has suggestions for GT's or the map itself, let me know!