Soviet infantry is fine at the moment. Their basic gear is enough to allow them to do their job. Apparently, soviets are not supposed to have versatility, so none of those things will ever happen. However, soviet combined arms is much more effective.
Its a shame because all of these upgrades being a part of of the core army would make it much more interesting. It promotes a variety of strategy and not being tunneled into the same commanders over and over, despite lend-lease being flavor of the month at the moment which has none of these upgrades.
None of these are obvious buffs, not at the point at which they would be available anyway (T3/T4 req). Its just my idea of making it more interesting and giving the soviets more flavor alone without taking commanders into account.