I'm not sure what you mean here. As far as I know Soviets have always needed to build T1/2 + T3 + T4 tech structures since the beginning of the game. Nothing changed there, at least nothing that the current team changed. Ostheer can skip whatever tier they want, now more than ever with recent changes to PGrens (Pschrecks allow skipping T2), T0 call-in infantry (allows skipping T1), the viability of T3 (allows "skipping" T4) which actually makes them the most versatile in terms of tech decisions.
I do think symmetrical balance is a valid criticism. The big problem however is having to deal with Relic's core design decisions that have left gaping holes in faction line-ups, such as WFA not having stock flamethrowers or indirect fire options. We/Relic can't add any new units or mechanics, so we have to work with what we got. And usually that means that the only option that remains is toning down some radical asymmetrical design (like USF's previous non-lineair tech routes) to a more conventional standard in order to make factions versatile enough to compete.
Personally I think Relic should have designed all factions with stock access to all the basic tools (ATG, HMG, flamethrowers, indirect, etc.) and only then put some asymmetrical designs around that.
T3 was not required in order to get T4 for the majority of the games lifespan.
When it comes to Ostheer I mostly meant the shift of fuel cost from buildigns to tech. There's little rearson not to go T2 before T3 and T3 before T4 because the buildings are so cheap.
I shouldn't have said criticism of the balance team. I just mean the balancing itself. Idk who was responsible for these changes.