Could someone please link a replay demonstrating that Pgrens are OP?
Can you point out where anyone called PGrens OP? It's their timing that's seems OP not the unit itself if you actually read the topic.
Most people here that are saying that their timing is OP are fine with just moving them to T2 without any changes to the unit itself. (me included)
And all of this is because soviets struggle very hard against PGs since they have nothing to rival them when they come so early. Other allied factions don't have nearly as much trouble dealing with PGs.