Would you?
For a start, PGren spam means no snares, which means the Universal Carrier's free to do its thing.
Machine guns don't care if they're fighting Grens or PGrens.
UKF'll also be a unit up. T2 + 3x PGren is 1220. 1220 / 280 (the most expensive UKF T1 unit) is 4.36.
Then when you consider UKF's starting unit is an Infantry Section and OST's is a Pioneer, they're effectively two up.
Would you take 4x Infantry Section 1x Universal Carrier or 3x Panzergrenadier x1 Pioneer?
Do you axis fanboys deal exclusively with absolutes?
2 grens/3 osttruppen and 2 PGs very early or HMG42 and PGs very early would be pretty much IWIN combination, suppress anything, mow it with PGs, rinse and repeat.
PGs biggest problem lies with their usability and difficulty to approach targets frontally without cover(which they shouldn't do, they aren't shock troops), not stats and changing timing to earlier pretty much warrants nerfs to performance.
They also are -NOT- a squad that should open the fight, grens or other unit should and get behind the cover, then PGs should move in.