if higuain is signed it will be official that lucho follows my post. I was the one initially who proposed messi is a much deeper role. As he plays false 9 anyways, so he is in the mid anyways, all you have to do it to put a forward 9 to keep the defenders and defensive midfielder busy elswhere.
Well initially there was an idea of fabregas exploiting the space upfront, but now when he is gone. Higuain will make, mess, alexis, naymar all better.
With messi playing behing the three (or two), from game to game.