Title says and I will explain.
So The waves of Ai are a little redundant and the spawns are just horrible at these points in the game.
So whatif instead of just swarming you they rode in on little jeep things or whatever, as the ft you could blow up these ai jeep to mass kill the ai so the swarm is more manageable?
I also think after each alarm that is sounded the Ai start to adapt and start all wearing heavy armor and stuff. It would make the stealth of the ft more of a focus then just rush rush rush