No they don't....
They are the same pop as commandos because they are both elite infantry. Just because commandos or pgrens melt under focused LMG fire that doesn't mean they are UP or deserving of a buff, they are flanking units.
Conscripts or tommies cant exactly throw a bundle nade and dish out explosive DPS clearing team weapons or wiping retreating squads even on the move.
So? Just because the meta is mindless a move LMG grens and 222 that doesn't mean Pgrens are UP. When the map allows they are worth their weight in gold, but any buffs to this unit will make them OP like the current 222 that people were crying about for weeks when it was in a decent position before.
Ostheer do not need any more early-mid game buffs
pzgrenadier doesn't have the performance of an elite infantry. They are maybe about the performance of a dual bar rifleman.
Yes, the dual bar rifleman is more expensive, but using the pzgren put the wehr at a population disadvantage.
and even if I agree the wehr is the strongest faction, tied with the soviet, it is despite the poor performance of the pzgren.
On the other hand you have unit like Obers - elite infantry squad with great AI performance, with a lot of abilities, potent to fight with ally call in units.
In current meta there is no much room for pgrens this days and that's a shame
the ober isn't that great either. They have the same problem as the pzgren just less severe.
I think the 4 men axis elite need a straight up hp buff. There's really a limit on how far target size can go on a 4 men squad.