You are wrong. It is not that okw does not have any other viable builds. It is that Volks/Obers/Panther are more potent than anything else.
A Panther/Volks/and Obers isn't going to save you from indirect fire, so I hope you enjoy priests/152/203 artillery turning your blob into red mist.
If I had ten bucks for every time a OKW player lost his entire army to my artillery, and I just ignore his Panther because lmao panther to counter infantry, I would have a lot of 10 dollar bills.
Sturmtiger doesn't even need to fire a shot to make people retreat, can never get that with a boring old Panther.
This.
You have many replacement for Obers.
Panzerfusiliers, Falsch, even Volks spam followed by Jaegers.
Jadgpanzer is as good at killing vehilces as Panther.
Puma can work wonders.
Right used AA truck is a nightmare.
But in the end you will always blob Volks+Obers+Panther.
You can't say that about SU and OST because they are encouraging to use combined arms. I mean, you can't spam Grens, Grens, Grens, Grens... into Tiger, right?
Soviets can't spam cons into T34/85.
Even USF can't spam Rifles without any support. You need 57mm or M20 or AA or Captain and then, you might spam Shermans or M8+Jackson combo.
OKW is just bullshit faction.
Not a single one of those infantry units can touch Obers in scaling and anti infantry power (while also being more expensive wtf Fallsch), Obers are bullshit I admit but all they need is their LMG34 removed or toned down.
Jadgpanzer Is 1. Not as good as killing enemy Vehicles as a Panther and 2. The least mobile medium TD in the game. It's not bad, but it's outclassed by other things OKW can make outside of the Panther.
OKW isn't any more bullshit than any other faction, every single faction the game is poorly designed. The only reason soviets have more choice is because of how the commander system works and how Soviet teching works.
Well, Ostheer isn't badly designed, but that's exactly the reason why it loses out to all the over factios