Does anybody here ACTUALLY play OKW? Do you know that you can already do this by just choosing LuftWaffe or Fortifications Doctrine? It's funny that you're trying to argue against having the MG34 as a T0 non-doctrinal unit because you're afraid of the imbalances it will create, but that strategy is already possible.
It doesn't even really make any sense why Relic decided to make the MG34 doctrinal. There's is absolutely no good reason why OKW's MG is on a commander other than they just wanted to make OKW different.
If you pick it with a doctrine, then you sacrifice other things such as not being able to build JLIs, fusilers or a heavy Tank Destroyer. So for that kind of choice, I'm perfectly fine with it.
OKW is a faction, like PE in VCoH, where units are very high risk/reward, except for Fusillers, Volks (which underperform) and now the Pz 4J. There is no other faction in the game where you get heavily rewarded or punished for your choices as you would for OKW (or that was the faction design anyway, due to recent balancing, its kinda fallen flat)
After all, in VCoH, PE didn't have MGs, had high reinforce squads but they did perfectly fine against allies then