The weak point of OKW in my opinion is that they cannot easily attain a critical mass of AI units. They're swimming in AT options with Schrecks on Volks, Puma, Panther, Jagdpanzer4, Raketen.
This is what bothers me most about the current balance of the game and high lights the difficulties as a Soviet player. Soviets have to 'manage' to defeat the OKW early. I use the word manage as StrumPio's are out performing every infantry type except for Shocks. Somehow, we are expected to take advantage of the OKW's slow fuel gathering by bringing out armor early-mid game. It is very hard for the Soviets to advance armor when it is hard countered through the Schrecks, Puma, Jagdpanzer or Raketen.
Puma/Shrecks and Raketen hard counter the T70.
The Jagdpanzer hard counters the T76 and SU85. Shrecks continue to nibble damage.
It is now mid late game and the Soviets have exhausted fuel on early light tank and a medium tank. Either one of the two new Super Tanks are coming. The Soviet's lack any sort of hard counter to them. The SU85 can't flank due to lack of speed, mobility, and weak armor. The IS2 can take it them head on but cannot over come their massive amounts of frontal armor. All counters take damage from the Raketen (including the IS2).
Its now late game. The OKW player has Super infantry on the field. All soviet infantry melt. Your T70 or T76 is one shotted by the Super tank. You can bring out the KV8 to deal with the Super infantry but it will be killed by the Super tank. You choose a second IS2 but the OKW player has dispatched their second Super tank or have brought out a Jagdpanzer.
This is the situation my clan is dealing with right now. Something has got to give in terms of OKW superiority. They do fine early game and ramp up starting mid game. Come the 20 minute mark the OKW can yield Super infantry. At the 30 minute mark the OKW can yield Super tanks. The Soviets lack counters. Non-doctrinal counters are literally impossible.
I don't have all the answers but I feel the Strumpios need to be toned down to allow Soviets time to expand the field during the early game. The T70 needs to be looked at and adjusted accordingly when compared to the Puma or PII. The SU85 needs to be looked at and adjusted accordingly when compared to the Jagdpanzer.
The only weakness I've identified in the OKW game play is if you are able to destroy one of their trucks. They will be unable to field a King Tiger but could still go for the 13CP Jagdtiger.