I would rather have a solution that doesn't make Ostheer and OKW early game pretty much the same. Not to mention the fact that the shrek problem would be even worse since it would be even easier to micro a shrek blob then.
Ostheer and OKW early game will never be the same, not even almost, because of a totally different set of units available.
Blobs are always easy to micro.
BUT Sturms are way more expensive than Volks and you'll want to retreat them after they've lost 2 models.
They're definitely not easier to blob than Volks.
Why would anyone blob shrecks anyway? You have Pzfausts and a good AT gun + good AT vehicles.
You'd also have to spend a lot of munitions on Volks for Pzfausts/upgrades. I doubt that you'd have a lot of munitions left for shrecks. In early-mid game at least.