You are, I'm afraid. He can play AM, but he's better as a box-to-box CM. He likes to pick the ball up deep, and he's extremely strong defensively and tactically. In fact, the thing that makes him stand out is his all-round excellence. CM is where he has played almost all his football for Barca and for Spain's U21s.
He honestly wouldn't be in competition with Rooney or Kagawa at all if everyone was played in their best positions. He'd take game-time from Cleverley and Anderson, but hopefully more than anything else he'd erase all the minutes we've had to give to the likes of Giggs and Jones in CM. With Thiago as first choice and Cleverley and Anderson as back-up, we wouldn't have to fall back on playing people out of position in CM any more. Oh, and he'd get Scholes' game-time too.