Soviet Tech does not need further discount.
Why?
Have you seen how much they have shaved off of ost tech to allow them to easily get T4?
Why can't same be done for soviet early tech?
T1 already give access to sacthels/AT sacthels/PTRS with no additional cost.
ALL of tech for ALL of the factions give unit AND its abilities/upgrades when applicable for additional cost.
It might be a shocker for you, but you don't need a side upgrade to shoot P4s main gun or get a pintle, or to get ober bundle nades and LMGs.
Soviet tech does not really need more discounts.
Based on....?
Again, Ost tech was getting adjustments and discounts and bonus starting mp for the tech until it was in a sweet spot.
Why other factions should be excluded from this?
In addition that would make commander that provide doctrinal support weapons less attractive.
DSHK is already much stronger then Maxim, 120mm can be buffed as much as its needed for it to be better then stock mortar. M-42 doesn't murder your manpower economy if you went T1 and specifically penals.
Don't worry, these weapons have plenty of appeal and still, ironically, M-42 is the one that's being used the most.
The problem lies in the design not the balance.
That's your personal opinion and that opinion is wrong as empirically we have established that it is exactly balance, mainly prohibitive initial timing with focused opening and underwhelming late game scaling that's the core of units problem, not the fact it can have AT.
If it was like you actually claim, then USF and UKF would not have weapon racks with AT weapons on them for mainline infantry/other infantry with snares to pick and PGs would not have shreck upgrade but another unit.
We know how reality is.
Time for you to accept it as well.