I feel like there are too many passages and complexity inside the base.
Outside areas felt a little too spacious, for instance the roomy building next to the base could be smaller, and the distance between the bases a touch smaller. It just felt like a lot of time out in the open which really slowed things down.
I really like the bridge, its a great kind of center piece for the middle battle area. Basically i think if you shrink the area around the bases themselves; reduce the size of the side buildings, which brings the bases slightly closer together; remove some of the passages in the base or something to cut down the complexity of the base, I think the map will play much faster.