And all other allied faction where designed having weapon upgrades while soviet where not...
Which led to the situation, where soviets got stock weapon upgrades, because soviet design proved to not work at all regardless of adjustments to base units. You're also talking about a time, where we still had extremely flawed "you need to pick a doc to even be competitive as soviets" era, which again is completely irrelevant now.
Design changed massively and so did the faction since the time when soviets were designed to be without upgrades.
It lost OP gimmicks and was compensated with stock upgrades and buffs to stock army over time.
Sure, there was a power creep, you're right about that.
No, its not going anywhere, because its easier to adjust 1 unit up then 20+ down and you had that explained to you many times by multiple people, including balance team members.
Why do you think falls were buffed instead of volks, jli, obers, PFs being nerfed to make falls viable choice?