There wouldn't be much point at all for matchmaking to be added. Seeing as you don't play against other people. Sure they could possibly make it where it lets you search for a party, but it's overall not worth it. Just play firefight with friends.
Yeah, It would be cool but if they did do you know how much lag there'd be??!?!? An aussie paired up with an American people would quit lose exp and complain, so if they are able 2 reduce lag. By all means add it to search for other people.