I can see what you're all saying but outside of Di Maria, Falcao is shark. Herrera, Rojo and Shaw (the latter of whom was playing fantastic) have all been injured. Martial is playing as well as expected and Memphis still looks full of potential.
Di Maria is the exception and I don't think we would have got rid of him, I believe he just didn't want to live in Manchester (house robbed, etc) and didn't go about leaving the right way (which is completely understandable - look at the ratty cod)
Fellaini on the other hand is still shark and shouldn't be starting for the reserves.