The thing is that you CAN go guards/T2 to counter the light vehicles but Ostheer is artificially stuck with nothing to counter the enemy because they won't be able to get a Pak in time due to the way the teching system works.
Nobody is asking for T3 to be massively delayed, just that Ostheer gets better counters earlier or T3 is just slightly delayed so Soviets can't exploit an artificial gap in Ostheers teching system. Add in the fact in 2's we will be seeing extremely early Stuarts and Axis early game becomes quite challenging.
Just add a high fuel cost to T3 and then subtract that additional cost from the price of T4. Also to give Soviets some extra fuel merge the AT and molotov grenade upgrades
What happens if I go T1 as Soviets though and get hit by a 7 minute FlakHT? And ostheer can 100% get a PaK before an M5 with quad upgrade hits the field, please stop being so dramatic, I've done it. Ostheer have always been able to get one before an M15 arrives and they can now, nothings changed. Only difference now is they have to decide whether they want to go heavier T2 (2x PaKs/PG Shrecks) to counter T3 or continue teching to Ostheer T3.