Comparing the tankbuster Stuka with the IL-2 and the Hurri 2D, I see quite some usage due to it's gun setup:
It has by far the highest MV (30% more than the IL-2, almost twice that of the Hurricane) with a round power right between them. THis will be a snipers weapon...and probably a nightmare for flakpanzers.
This would be a good argument if the IL-2'S 37mm cannon had trouble penetrating the armor of any GV in AH... but it hasn't. As long as there is no GV with enough armor to push the NS-37 to it's limits, the Shturmovik is holding all cards compared to the 87G.
Once upon a time, there actually was such a situation: When the Il-2 had only the 23mm option. At that time the Hurri D had a performance advantage when engaging Tiger & T-34/76. Today, with the overpowering 37mm, the Hurri D gets more selected for sentimental reasons

And as a Wirbel driver, I would be glad if the cannon bird upping for me was a Ju-87 G. Slow, vulnerable and only little ammo. Much less dangerous than a Il-2 or a B-25H.