I don't think US needs help at all, but the 42 was buffed and indeed perhaps slightly overbuffed, and we'll see earlier Grenade techs now.
I'd say that exactly might become a problem.
You'll be forced to tech early and spend fuel to counter menpower only unit, because your early game units can't contest what is being thrown at them.
This screams imbalance and bad USF design.
But next changes will fix it to a point.