I play more Coop than multiplayer because my computer isn't good enough to run the game in a competitive environment. I think that the worst thing about Coop mode is that when you're dead you have to wait for everyone to finish the current objective. I think if you capture or destroy an objective, you should get one free respawn maximum, as well as if you're team killed. I've been shot to death more by my own team mates than by the enemy, so it would feel a lot better if I didn't have to wait out a whole objective because I was running away from the cache that just blew up right into a twitchy new player's line of sight.
It would also emphasize more aggressive pushes, wherein someone with an explosive could bum rush the objective and sacrifice themselves.
Please consider this for your next big update, and you're doing great so far!