How so ? Early maxim or Vickers in a prominent garrison is the biggest headache for OKW since Flak HT sucks vs. Garrison, mechanized takes forever, and ISG doesn't do enough damage. Sturms can't do shit unless it's basic infantry squad in a 1-2 window house.
If you have a Flak HT or an ISG you have a truck and you have flame grenades.
If USF can handle it in live I think OKW can survive. I could be wrong but I'm not too worried about this change.