I see an issue with the public resupplies. Its going to be too easy to keep a base there due to the infinite health and ammo. So once a base its there, it keeps there.
I would suggest just putting a large ammo and medpack (or 2 of each medium ones) so the supply isnt infinite and a strong attack can take it out.
Still, the distance is too big to realy become too strong. But since its a 1 way rout with a single doorway to the main section you can put up a base a bit closer to that doorway.
Also, screen 3 shows a major spawn to spawn sightline with a capture area in the middle. It realy needs to be blocked there or its going to be a situation worse than 2fort there.
EDIT: On a second look i noticed its 1 way glass without even a doorway under it. I think that caused some confusion for me there. MAybe ingame its better visible as glass as at first i though i could walk through. Maybe some indication lacks there.