Also wouldve took a lot out of teh SP too. Plenty of co op games about nowadays, including RPG's. I would never want TES to go mp/co-op.
TES is the only RPG I play. There aren't many good RPGs that have co-op. While some of you may say that's why TES shouldn't have it, they are the best in making RPGs and if they planned on putting in co-op then I have faith that they would get it done right. The only RPGs that I've enjoyed with co-op have been Borderlands and Saint's Row 2, but neither of those are your classic dungeon crawling, sword and magic RPGs. Co-op was done very well in those games and added a great extra dimension to the games. If TES had a similar drop in/drop out co-op then it could make it so much more fun to play. Honestly I get bored after I've played through the Oblivion story and completed all the quests, because it was the same thing, just me playing the same experience. But in SR2 or Borderlands, I've played through those games numerous times with different friends or even the same friend. Adding another human player adds so much to a game and brings a totally new element that is lost in solely SP games.
And for those who say it would take a lot from SP need to realize that they'd have a separate team for MP. They wouldn't just take member from other departments and those elements of the game would suffer. Bethesda is an amazing game developer and they wouldn't put out a half ass product. If they implemented co-op, I think it would be quality and not just slapped on.
Also no one is forcing co-op on you. You wouldn't be forced to play with people you don't want to play with. Everyone seemed to think that if TES had co-op they'd have to play with annoying little kids, which is just not the case.