Manchester United are finding a way to score goals on a regular basis once again, and it could be down to one key switch. If there was a turning point in Manchester United’s season, you can pinpoint it to the Boxing Day win over Aston Villa. United were 2-0 down at half-time and not many gave the team much chances of a comeback. Prior to this, United had failed to score in four consecutive matches against Bournemouth, Bayern Munich, Liverpool and West Ham. Then one switch seemed to change everything, with Alejandro Garnacho moving to the right wing, inspiring a 3-2 comeback victory. He has not…