Here you are, a better solution:
1. Remove shreck from volks. Instead, volks can chose one of these 2 upgrades:
a. An STG 44 for the squad leader.
b. Two g43s upgrade.
2. New OKW squad: Tank busters. A 4 man squad, buildable from Med Truck, with an expensive manpower cost and who comes with 2 shrecks by default. The expensive mp cost willprevent blobbing, and it will be fair too, because no amo will be spent on the shreck upgrade. Being expensive as mp cost, they can't be spammed and they will have a poor AI performance because they will have rifles, not automatic weapons, an additional reason not to spam them. This way, the OKW player can chose his early / medium game stage AT solution by building eather the med truck for this squad, eather the Puma tier to build a Puma.
Such units (puma or the tank busters, will most probably need a raketen to support them).
So this solution will invite OKW player not only to stop blobbing, but also used combined arms.
If you guys like this solution that was proposed before, let's support this and convince Relic to adopt it.
That would probably solve several problems, yes. Including OKW's sometimes chronical MP float.
The upgrades shouldn't be too powerful, however. Volks as they are have pretty decent AI power, and unlike Ostheer who needs LMGs to scale OKW has access to 2 powerful infantry in their tech, 5 if you count doctrines. At best Volks should have firepower about on par with Rifles with 1 BAR. If they want elite infantry they have a wealth of options other than Volks.