I believe Kappatch 2 solved it with a simple received experience modifier for Schrecked up squads.
At the beginning , Sturms had double shrecks as upgrade and volks had Pzfausts + an "AI upgrade" (3 MP40s lol).
It worked out quite nicely (although the AI upgrade was kinda meh). It was really refreshing to play OKW without massive shreck blobs.
Reduce volks shreck damage to bazooka level,decrease upgrade cost slightly to compensate,that way still good vs light armor,but less so vs medium armor.Buff raketen.
This would make spamming shrecks even easier. A buff will make the Raketen better, no doubt about it, but I'm not sure whether I would want to build this unit.
Until I have AT vehicles on the field I could still rely heavily on shrecks.
To make the Raketenwerfer viable without adding Pzfausts you had to buff its aim time, its durability and also its reliability. Ground seems to be its enemy no 1.
The Raketenwerfer would be a unit worth spending MP on but you'd still see lots of shrecks running around, maybe even in blobs just as before.
Alternatively decrease volks XP gain rate and shreck long range accuracy(i.e vet accuracy bonuses don't apply for shreck)
These are all "soft" changes. Reduce XP gain? You'll see vet 5 volks 5 mins later.
Reduce long range accuracy? Only makes it even more unreliable vs early vehicles.
Seriously, the problem is that Volks have shrecks.
It's not their vet gain (every unit with AT weapons vets up fast), it's not the shreck itself, it's the fact that basic infantry can simply be upgraded with the most powerful handheld AT weapon in the game. Amazing vet bonuses are just the icing on the cake.
OKW needs "hard" changes like completely removing shrecks from volks and replacing it with something else, something that every other basic infantry unit gets (except Cons ): an AI upgrade + AT nades.
Well considering how hard it is to counter scout cars + flamers as it now for OKW if you want to make that even worse you could get rid of shreks.
That's why people say Volks should get Pzfausts.
Or how about give OKW more anti medium at options other than the Jadgpanzer which costs 265 fuel (due to reduced fuel income)
What about...getting a Puma? Needs more micro but still...