It doesn't explain why do they need the suppressive ability to be native. You do not fight a M3 or a dodge with the suppression.
It's an issue with Volks being completely pushed off early by rifles. Believe me, I'm very sympathetic to the issues that both USF and soviets have with their infantry right now but sturmpios are too expensive to field enmasse.
I don't think the issue is whether or not the Okw need an early suppression platform (be it Kubel or my-34 ), it's how those units preform. Shrek blobs are annoying but I don't find the okw muni income to be so out of wack that they need a muni dump just to acquire suppression. Early shrieks are often needed for m3s and m20s and a 30muni dump to stop a blob would hurt that a lot.
I'd love to see cons buffed and the Kubel nerfed in some way but I don't think a muni dump is the answer.