I would love bots, but unfortunately that probably wont happen. They probably think that the extra work needed to create competent AI would go to waste because people like MM more anyway. Unfortunately, I don't think most gamers demand or want bots nowadays, which is sad.
I HATE that lie about technical reasons. Example: Treyarch claimed they couldn't make bots go after objectives, but maybe on a next gen console they could. WHAT? Take a look at Battlefront 2 (star wars). That's on PS2 and original Xbox, and the bots go after objectives. They don't just stand around either, they'll crouch and move around and your AI allies will defend an objective as well. At the least there could be a one sided objective with the players always on offense like in Onslaught in BC2.
I would never EVER use them, since bots are always exploitable and will never be as fun as playing with/against humans. But I wouldn't be against them being included, as long as they are left out of online multiplayer.