For combat stats only, volks with max veterency get
-24% recieved accuracy
+30% weapon accuracy
-20% weapon cooldown
For comparison rifles get
-38% recieved accuracy
+30% accuracy
-20% weapon cooldown
Ostruppen get
-28.5% recieved accuracy
+40% accuracy
-20% weapon cooldown
Conscripts get
-37.3% recieved accuracy
+50% accuracy
-20% weapon cooldown
The only mainline infantry that gets worse combat bonuses is the infantry sections who get less recieved accuracy reduction and less accuracy-but make up for it by having the lowest stock recieved accuracy of any mainline in the game by a fair margin.
My point is that volks vet really isn't that good. The passive healing is great and imo it wouldn't hurt to put it back to vet 3 but other then that, they just don't scale as well as pretty much any other mainline.
I am not saying they should be buffed, but they are definitely on the weak end of mainlines.
Volks had their vet gutted pretty hard when they had shreks that let them vet up pretty much instantly. I can get behind a vet buff for them, including returning their self heal at vet 3 since it's earned now.
Between vet and perhaps more "truck related" buffs to help them scale without all the weight on vet I think volks could be a bit more interesting
Its no secret I don't like volks current design, but incorporateing their scaling with the unique okw teching could make them more dynamic and interesting than "rifles but worse and instead of side techs they just get everything when you build your first tech"