I have. He's given far too much freedom to go forward and always has been at city to be called a defensive mid. Nobody's slating Yaya here, it's just that he's been best as a box to box, not as a deep playmaker. It's been partially obscured by us not having a deep lying playmaker bar Pizarro briefly but when you look at players like Ballack, Xavi, Modric, Xabi Alonso etc you realise the difference. Yaya's best work has never been deeper than the edge of the area bar the odd run.
That's the point I'm trying to make. His best games for us is when he's played as a CM or further forward