they already tweaked at guns received xp, they're definitely open to that
But that's completely different. Let me clarify.
AT guns: they increased the amount of xp required to vet. They didn't change how much xp they gave to other units.
Now, let's go with volks.
Volks:
-if you increase the amount of xp required to vet, thats would be a huge nerf since you can't just depend on them getting shrecks and fighting vehicles in order to gain veterancy.
-if you decrease the amount of xp vehicles gave, you are just altering the whole ecosystem.