A big problem with OKW's faction design is that they have literally ONE munitions sink in the early and mid game: PANZERSHREKS
In the late game you have doctrinal artillery that serve as ammo sinks. With increased muni rate, OKW was able to more often use abilities such as grenades, and plant mines etc. The Shrek blob was still a problem because there was literally no other munition sink.
To fix OKW you need to not lower the munitions rate, because all that does is prevent OKW players from using grenades and mines to save for shreks. Instead you need to provide OKW players with different munitions sinks.
Maybe make the Retreat Point upgrade cost 100 munitions instead of manpower, force Obers to UPGRADE to the lmg34, Falls to upgrade to their fg42, additional pioneers at the mech truck require a munitions upgrade, etc etc.
The Shocktroops should only be outfitted with Mosin Nagants and be forced to upgrade to PPSh's, and forced to upgrade to smoke grenades. It's only fair right?