Your biggest problems are as follows:
-The way your spawns are set up, all players are funneled along the path opposite the side with the building in mid. People are not using much of the map.
-The run-time from spawn to the point is a little long, especially if you don't use the path I mentioned above (furthering the problem that people aren't using the whole map)
-Most areas of the map are too wide and flat, and aren't interesting to fight on (especially the outdoor areas).