Amazing how you managed to do 10+ pages of offtopic debate on whether pios or engineers are better, two units which are both just fine for their cost and role
Random teamgame matchmaking is quite bad indeed, but at least it's "fair" in the sense that everyone else on the ladder has that exact same issue. Your ranking on the random ladder roughly represents your overall ability to carry inferior teams.
In your test were all model of the new crew a.grenadier or was there also a Pg model?
In my test the gun was crewed by 3 assault gren models. Further testing seems to show that normal grenadiers and panzergrenadiers also get the same extra tracking range.
Didn't get any extra range with osttruppen, volksgrenadiers or conscripts.