I compared Grens to Volks, not two LMGs. I actually could care less and said nothing about the USF LMGs. My question still goes unanswered after you threw your little fit. If Volks have the same price, 5 models and AI plus AT capabilities, why would it be so incredibly forbidden to give Grens also 5 models in addition to their AI plus AT capabilities? I don't mind changing their stats a bit, but the importance of squad sizes is one of the biggest issues in CoH2. You can't just magically make up for having less models by giving them some stats here and there as long as it stays more or less balanced.
That is flawed logic.
Same argumentation can be used about upgrades(which soviets don't have), reliable indirect fire(which UKF and USF don't have), light vehicles(which Ost don't have), forward retreat points(which ost and sov don't have) and many, many other features that X army have and Y don't and would benefit greatly from.
And lets just ignore placing shreck and pfaust on the same level in your post.
Model count isn't that important to throw all balance achieved so far out of the window.
UKF players often NOT upgrading to 5th man is the very best example of why 5 men grens aren't needed.