You mean like stuka dive bomb doct and b4?
You can counter B4 without stuka bomb. It's just more difficult.
And Stuka is useful not only against B4.
Force inf to retreat, recon over retreat Point, use stuka and watch how it hits in same moment when inf come back to base.
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If Soviets go for IS2, ISU or T34/85 they should be fine vs King Tiger, Tigers, Panthers.
If US Forces go for something different than P47 they won't be fine vs these units.
Right now P47 is a key because if you won't chose it, you will have hard time in late game.
Doctrinal Pershing would, at least, make Airborne used in 60% of games, not in 80%.