You're placing too much importance on starting positions, rigid formations on paper etc. He didn't look to be getting chalk on his boots to me when he was expertly sliding Aguero in for his 2nd, or when Nasri was arriving into the box for his one-on-one. Or when he was probing with Yaya outside the box. He has to retreat to the left when we lose the ball, but the second we win it he has the freedom to go wherever the space is, leaving the left wing to Kolarov. Nasri on the left turns our 2 man midfield into a 3 man midfield, which is very useful.