You do realize OKW has even faster access to the Puma than the Soviets have access to the T70 and it’s not an issue, right? T70 is perfectly viable vs okw despite the puma meta.
And as I have already said, they are paying for that with no healing, which means greater muni expenditude or greater attrition, puma is also never build first-luchs is, unless you lost early game, in which case you failed at OKW.
Seriously, argument like that equals to "lets give soviets stock LMGs, it works for UKF, so it'll work for soviets too!".