Placing Anti-spawn volumes on an invisible barrier, then scripting them to move after a certain action (such as using the Turret to destroy a Phaeton) can cover and uncover spawn points, which help teams move up (and can be used to unlock better vehicles and weapons. There can be a chain of scripted events too, I just put a stationary warthog turret and the Phaeton as an example to replace capturing a zone.

Once we get 1-bomb, it should be easy to create the final "core capture" stage, but.