I was thinking that this game would have been ripe for a Tactical Team Deathmatch. A standard deathmatch where teams kill each other till either collective lives run out or a total team point is reached. I was just thinking that such a rich array of skills like stealth disguises, turret placement and even reviving squadmates would be slick in a deathmatch setting. No escort missions or other objectives... just a fight till the death as a team.
Hop that it can be implemented in a DLC down the road.