To start with i really like the idea of considering reteching for OKM, i mean it had so many changes lately it has an uneven balance situacion, too much cheese on one side (volks, stukas, raketen) and way out nerfed iconic units (FlakHT, KT, JP4).
IMO OKM should ve revisited in the early inf ground first, since it has less options than other factions, i mean its volks spam or dual spio opening.
I think
Obers on T0 is a good idea but behind tech, LMG upgrade behind even more tech (T4 maybe). Because unvetted obers have it too rough against vetted riflemen/penals (I know its the worst case scenario) but giving them a new role, as an early defensive squad (like a gren clone, without fausts) can leave volks for other changes/nerfs. Maybe Obers can be behind T1, to force an AI/AT situation too.
Edit/Added: Early game should favour allies to push otherwise axis OST defensive tools must get nerfed badly, obers must come as the lategame mainline inf not the new bullies in the neighborhood.
I like also the
MortarHT for Indirect fire, also making stuka a docrtinal option is a viable solution to keep it strong as it is (maybe on firestrum commander)
Edit/Added:This makes OKM able to use double smoke options, one with LeiG and the other with the mortarHT. Smoke its a great unconventional tool, well themed to OKM.
Im not sure about
250 being in the OKM rooster, i find it lackluster but with Spios seems interesting concept. If you remove HMG34 and use 250 as suppression plattform, it can be OKish but it should be tested before, its the OKM theme but a way radical change too.
Edit/Added:If 250 becomes the standard suppression tool for OKM, it should get a firing cone range increase, a little to say the least, and can be combined with obers as a defensive measure, sounds pretty interesting, also micro intensive
If
T1 focuses on logistics as a defensive tool (FlackHT,IRHT,LeiG,250) then
T2 should focus on Target picking tools (Pumas, luchs, MortarHT), i like this idea and you could push it even further a little more, I.e. goliaths can only be deployed from T2, HetzersFTanks, Ostwinds, Stukas if doctrinal and so on.
Being said this, luchs,flakHT should be rebalanced if drastic changes were made like removing HMG34 and stukas
I need to say that OKM tank situation is pretty weird too, panther spams shouldnt be a thing on OKM, maybe for OST but not for OKM. Limit the
panther build limit to 1, make it a panther commander stock (and please lets fix the panther commander free call-in in spec ops, its a cheaty way to get a tank.) This forces to combine tank arms rather than massing them up. More OKM theme there.
If panthers get limited maybe it would be worth to get a KT to double on AT
I want
LeFh to be removed at all from OKM commanders, swapping it for stukas maybe. Again trying to separate OKM from a OST strongest units copy.
A new OKM tech should change both, OKM needs and objectives.
The way I see OKM is a very high risk faction with moderately high reward, that focuses on pure aggressive tactics with unconventional tools, like denying enemy territory rather than capping for yourself, diving into specific important objectives rather controlling frontlines, using tanks as defensive tools rather offensive, fear propaganda and ambushes.
I like your proposition overall