Can you please give me a reason why this so called 'choice' needed to be happen that you have to purchase the upgrade even once your at tier 4?
Regardless how its spun, it will delay your infantry upgrades or your tanks.
Bad question to ask someone on a holy crusade to nerf every single soviet unit to the ground.
Now, mobilize reserves was good alternative for T3 when it was still in T4 as free choice, soviets already pay hefty sum for tech+sides, but now its really not a choice at all, you have to buy it, so soviet side tech cost increase even further because apparently most expensive tech isn't expensive enough.
Penal vet addition feels completely useless, I can't see a single person getting the upgrade for penals alone and it seems like the new "+10% vet3 to help with scaling late game" solution, it isn't going to help on the long run at all.
Con 10% vet3 acc will be missed, but I do understand why its being removed, without it at least if there will be a need 7th man can be buffed directly, but ppsh cons will get a noticeable clap for scaling, they already were worthless pre vet3 anyway.
I'm indifferent to ram changes, I already gave up on the ability being usable or useful, but its completely irrelevant that T34 gets engine crit instead of immobilize crit, when due to health limit its guaranteed loss of a tank now. Just stop pretending like you did with demo charge and remove and replace ram with something actually useful.