Also one is that when a mg is suppressing first it only suppresses one model, the rest will continue to run at normal speed until a move order is given. This is why volks can usually just run up to the mg and throw a grenade. mg42 is a exception due to its high aoe suppression
I was just about to make a thread about this as I noticed it a month ago and continue to do so but keep forgetting about it until just now.