PF, Grenadier use a different weapon then PG/ST, lets not confuse the issues.
PF are not used over volks 90% of the game. In last tournament PF where built in average of 2 per game so they where used in conjuration with VGs.
You can't really use the last tournament as grounds, I should make this clear I am strictly talking about Vs UKF.
I just left cheat mod and had a 5 man double bren tommy squad in green cover Vs a Fuzie squad with G43's in green cover, both vet 0.
I kept the tommies in position and sent the Fuzies upto the sandbags of the tommies and had them fight. The Fuzies won with 1 man left. This didnt happen all the time, sometimes the tommies managed to just scrape a win, just try it for yourself.
Do you see the issue with this though? A mainline infantry squad with an 80 muni investment beats another mainline with 80 muni investment + weapon rack unlocks + whatever the costs of bolster is per squad. No additional side tech, no 50+ fuel and 300+ manpower investment to stand a chance.
So what are you supposed to do? You can't beat the pfuzies in the rush for the upgrades to stand a chance in a 1v1 engagement as they gain access as soon as they tech up. If you dont tech up you risk being ruined by LV's and if you dont upgrade you simply lose infantry engagements.
Games are obviously more dynamic that a sterile test environment and I am strictly speaking about this engagement, please dont (Not you) reply with but you should use X on the flank to do a pincer manouver with a 4-4-2 formation pish, its not helpful.