I tried to use the MG's a bit more but at the moment they seem to be quiet useless because of a problem in deployed mode. Whenever I try to deploy a MG on a wall it gets deployed somewhere behind the wall. You can't aim properly and have a very low FOV. For example when I want to place it on a little wall on a roof, I can't overlook the place in deployed mode, though in undeployed mode it is possible. The obejcts are distracting the view. I will try to make a bug repot ingame with a screen shot but I just wanted to inform you about this problem.
