5. Better A.I.
Five games later and I'm still being driven off cliffs, shot at and blown to pieces by my idiotic marine companions. Whether its getting stuck on scenery, running head-first into an enemy tank or just generally getting in my way, the friendly A.I has been universally terrible across every Halo title and I think its about time they got their acts together or stayed out of my way entirely. If I'm going to be stuck with computer controlled tag-alongs I'd prefer them to be useful and not just light comic relief/walking ammo crates. While I'm on the subject of computer controlled characters...