Its already ruined forever.Though i would like to hear your suggestions.
Not as much as people here (or majority of them) want to.
As for changes, i would be very conservative. HUGE buffs to vet, some units adjustments, possible upkeep increase to make blobbing not so attractive and fuel costs changes for some vehicles there and there.
Maybe 5th man for their elite infantry as one of vet bonuses, which would eliminate OKW weakness to lose vetted units in one shot to RNG BS and also increase bleed to further prevent blobbing.