Rooney looked so much better last night when he moved deeper after Davies came on.
It's all about body position.
In the first half he was constantly receiving the ball with his back to goal, with two players marking him. As his touch was a bit off to say the least, and he doesn't have the pace to spin away anymore, it was hindering us and meant that Schneiderlin and Gueye had only the wings to hit as a forward outlet.
Once Davies came in and we moved to a three, Rooney was picking the ball up facing the goal.
At home, this is vital. It allows him to dictate the play and spread it out wide or into the forward areas (as he did for Gylfi's goal).
Away from home I have no issue with him playing as the '10' in a 4-2-3-1, as we are mainly counter-attacking and that suits him.
Horses for courses.