Really startin' to feel Pgren nerf was unnecessary...They have a span of about 2-4 mins midgame when they are useful.
After armor comes out, that's 320MP down the drain, you're lucky to get one shrek shot off before you have to retreat. The only way to use them late is to ambush, which most decent players won't just walk into.
And how do you use them? Because PQ said they are not assault troops, they are deterrent to rush against LMG grens and should work in pair with them to get the full of the unit.
That does make sense if you look at the weapon profiles.
You can't stay at distance against LMG grens and you can't close in because pgrens are next to them.