Rubbish.
The way I see it is that Obertan is frustrating as f*** and does nothing when he gets close to the box so I sometimes think that Simpson tries to do more than he should really. As in it's usually Simpson who does all the crossing/deliveries from the right wing instead of Obertan. More often than not, Obertan simply just passes the ball back to Simpson instead of crossing himself.
Simpson still needs to work on his attacking play though, his crosses are hit and miss.