Game changed a lot since that. There re changes that affects gren spam vs cons.
previously one could go 5 cons into t34. And there were no threat of build order lose. Skipping T1 t2 units ATG and grenades even. Now its impossible.
Right now I just dont see were is advantage that allow to win equal game. I have a weaker basic infantry and most expensive tech tree 800 210. If game goes long you cannot skip a single tier.
One needs T2 ATGs vs late tank and possible medium. One need T1 sniper in late cuz there is no way to play against his ATGs. T3 T4 are unskipable
OH tree is T1+T2. cost is very low
Vet 3 overhaul gave Conscripts a significant boost again Grens meanwhile Grens have had no buffs - if anything changes have been in Soviet's favor. They have also had other buffs like PPSH buff (which is still pretty meh, but at least it doesn't outright suck anymore).
Soviet T3 still comes out faster than OH T3 in most evenly matched games and if you argue that OH doesn't need T3 and is thus cheaper then that means you are failing to exploit the OH's player's lack of medium armor. At most the Axis player will have only 1 Tiger rather late in the game. A single mine or AT grenade can quickly eliminate that threat.
Mortars still counter ATGs fine either to smoke them to allow flanking or just bombard. Flares at Vet 1 are very useful for this as well.
Finally, OH win rates in 1v1 and 2v2 have been down in recent history... so I really fail to see how you can justify OH being nerfed.