True.
Gren G43s are just in a weird position where their advantages are really just temporary and eventually allied infantry tend to outmatch them. I mean back when cons had no 7th man upgrade, sure, I used them all the times, but now Tightrope's video shows that even there they get matched pretty evenly... in a best case scenario for grens.
On the other hand PG G43s are ridiculously strong, like they do almost as much dps as lmg grens at long range.
I agree, the Gren G43 upgrade isnt really fitting for the unit, they're simply not a close-range squad, and they shouldnt need to be: That's what Pgrens are for. I'd agree that a JLI-like upgrade would be a better fit... but I'm just not sure it would be balanced in the context of OST.
Pgrens with G43s really do do an awful lot of damage at long (max) range, vet3 is ~20.25 vs LMG grens at vet3 with 23.61, assuming the seralia numbers are accurate. Pgrens then have the further benefit of keeping most of their DPS on the move, and being monstrous close up, in comparison to the LMG grens. Very strange.