Stuka can be dodged with ease, and OKW delays the healing.
Calliope is doctrinal, costs less than a stuka or a pwerfer/katy (teching you forgot) and it is much better than any other arty. And having ZERO armor works just fine (spam atgs, zooks...then maybe get a M36). Wipe everythings.
Panzerwefer, comes late...delay ostheer tanks, hard to get due to T4 has insane prices. Wipe everythings.
Maybe you should get your facts right.
I don't understand the argument with teching costs, you get alot more units then only a Werfer, might as well split the teching costs to one third for each unit that you can build.
Getting a Calliope delays your tanks as well. Not to mention Ostheer has much better AT options then USF stock. There is a huge difference between always penetrating tanks and not penetrating tanks, you can overextend alot more with Axis tanks then USF ones.
And a non doctirnal unit is alot better then a doctirnal unit, because you don't actually have to choose a commander. USF stock is the worst faction of all others, they actually need commanders to stay viable.
Calliope needs nerfing and it's price decreased, same as the Werfer needs nerfing + it's supression removed.