I just did. Negative one sale from me. I was going to buy this game on release, but no co op in Halo, no buy. Some people here think that since the last time they played co-op was many years ago, therefore why would anyone else play it, therefore you are wrong. When a series staple game mode gets dropped for the new iteration, it is a legitimate gripe for any game.
I agree. It shocks me that people in this thread are saying, in so many words, "Friends?? Real people next to me?! Playing on the same TV?? That's so old school! Get with the antisocial times!"