This comment is fairly amateurish and seems to ignore completely, the fact that MG42's can't reposition. The pack-up animation is REALLY long, and the unit walks slowly, that you're going to be overwhelmed by the allied player. Especially if he has shocks (which have smoke!). Regardless of the allied unit, as soon as you see smoke, the best option is to retreat or lose the MG outright. This is the case, 99% of the time.
Did you just call a top ten player "amateurish?" Wow. Just. Wow. Speaking of "amateurish" you're aware that you can overlap your MG with another's arc of fire, right?