what's your piece count like? It looks like you have some good buildings going there, but they are very monotone and homogeniuos. You should focus on making each area and building distinguishable from the others.

Also, if you have buildings lined up so that you can see through many windows simultaneously, or have many visible simultaneously, it will cause framerate issues. It is highly recommended that you either limit your use of real translucent windows, and instead use other means for creating a window-like feature set. You should at least create visual obstructions within the buildings so that peering through several windows at once is not possible.

Also, also, if you are using vehicles, you may want to check out this pre-fab I created for holding vehicles until a certain number of players have joined the match. It could be a new standard for helping vehicular play on BTB seem more fair and keep players around when the numbers are smaller.

Good luck!

https://www.forgehub.com/maps/btb-vehicles-unlocked-by-player-count.5514/