Ummm, why would we move a critical piece of our attack? He's not as flashy as Matarrita, but he is effective.Matarrita can certainly play. Jumping to that conclusion is ridiculous. Maybe try switching Wallace to LB and Matarrita to LW.
Matarrita is just not going to become a good defender at NYC. Until he's at a club where he will actually be benched for being garbage on that side, what we see is what we get.