This is in no way due to the new mod, thats great, but one weapon is ruining it, in fact in some maps it is all you hear, you can all guess it's that MG with way more ammo than any other weapon. They are all using it now, and why not it gives you a huge advantage, loads of ammo hence no reloading and it shoots through entire buildings. I have at times counted 80% of players equipped with it, and of course we have more and more wall spammers who just open up on every wall on chance.
It is not the entire reason people are leaving but this urgently needs a remedy, and my suggestion would be to limit the magazine to the same capacity as the other guns, they still have the penetrating power but it takes longer to reload, so a bit of a balance. Or give the other weapons the same magazine capacity, at the moment too much of a gap and we may even see every player with one, certain death to the mod.