No one will disagree on that.
But i think the problem is less relevant for Wehrmacht because you only have access to Puma in 1 commander, you need tanks to survive while OKW players can get access to 3 strong units in Mechanized HQ. IMO its definitely a faction design problem.
I dont know if a OKW rework is possible but if so Battlegroup HQ needs to be more attractive and Mechanized less attractive. OKW rework should also include some changes to the commanders.
Commando Panther should be moved to a 2nd tier commander for example.
It was annoying as hell to see Mobile defense in every game last year but we see "Specops" in 7/10 high rank 1vs1 and that sucks hard too.
I've got a thread up on making Battlegroup attractive: the Jagdpanzer one.
As for Grand Offensive, I think locking it behind the SPHQ is enough. A Tiger can be worth it relative to a Panther or a Panzer IV on raw cost.
It's definitely
not worth teching another truck for.