I meant that in real life no army contains 80% snipers, and noone is choosing a 15 kg sniper rifle (Barrett) if he's going to fight many enemies in short/mid range (fighting many enemies in short/mid range is something that happens in Soldat very often, still players use Barrett for this).
And usually better weapons cost much more, so it's economically difficult to throw out all old weapons and replace them with new uberpwning one.
But you are right, I was wrong saying that it's very balanced. I should've said it has good rock/paper/scissors mechanism.