I'm not a complete expert on the game of course and I am definitely open to being proven wrong, but I just didn't see how alot of these points made any sense. If I fucked up completely somewhere and like misread then I apologize, I'm not trying to be a prick, these just felt like unfair points.
If a unit has no pure equivalence, it doesn't mean it is not the best tool to do what it is supposed to do.
OKW has actually no drawback in term of AI, it has every tool available on stock: Assault (sturm) + Support (volks) + Elite (Obers). And can decide to field whatever specialized infantry they want from a doctrines.
In addition to this AI soft power, you have your atgun from T0 which mean you never have to decide if you want more AI or if you want to go for AT when you go T1 or T2.
Because in fact you have more AI whenever you decide to go T1 or T2, flack-HT and Luch can be different in their usage, they remain strong AI vehicles and you still can develop AT capabilities with shreck or Puma + access to Arty support ISG or Stuka in T1 and T2.
On this last point your comparison with the mortar and Kat is irrelevant, mortar isn't a T1 unit and Kat a T2 unit in the soviet teching.
So of course as OKW you make decisions around going T1 or T2 but those are based on your personal preferences on unit abilities. Do I prefer a Flack-HT or a Luch? Do I prefer Puma or shreck? Do I prefer ISG or Stuka?. Nothing like Do I go T1 and only have AI or do I go T2 and only have AT like USF does.
Nothing like Do I go T1 and only have M3/Sniper/penals or do I go T2 and have Maxim/mortar/Zis to support my cons
Nothing like Hammer or Anvil for the Brit
Nothing like: Do I delay my teching and build grenade/heal/BARszooks/molotov/5thman squad/ATnade etc..? No you have teching and grenade/shreck/heal or teching + repair station.
And the cherry on the top of the cake is OKW can still field its truck on the map and lock 1/3 of it, now around 10 minutes... (thank to the fuel start removal).
I don't want OKW being nerfed, I want OKW having drawbacks in their gameplay based on the player decision making. Drawbacks you must exploit to beat them as Brit/USF/Sov.