If people spam Grenadiers and therefore dont need Pgrens anymore once they arrive, then one >might< assume that the problem is related to tier 1 and not Pgrens themselves. But why balance tier 1 in balance patches when you can just redesign a faction (once again)?
What the F are you talking about?
T1 is balanced and from the very moment PGs started appearing earlier, whole 1v1 META emerged about rushing them.