Yeah he obviously does a little more than that. But, he is a limited player and is already 30. Decent player but, we should be aiming much higher.
Limited in what? He has a role that he executes perfectly, and he has never been a liability to anyone, he is a decent passer, he has a very good positional sense, he anticipates well.
Every big team needs some grafters and he is one of them. This type of "limited" players allow players like Di Maria, Blind, Herrera, Mata, Januzaj to have a lot of freedom without worrying about there defensive tasks.
If you ask me, looking at our team, I would take Luiz Gustavo, Javi Martinez, Mascherano, De Jong or Schneiderlin over any other midfielders.