Nothing at all.
I'm talking about the season as a whole, and I haven't even mentioned short corners. I just think sometimes, when you are struggling with something, you go back to basics. In this case- get the best set-piece taker to aim for the best attacker of the ball. That is pretty much...
The players must feel like they're in a parallel universe- coached to take all set pieces in a convoluted and indirect way yet conceding every time the opposition lob the ball in to the box.