SK: love the eastern front stuka analogue. A lot of this comes down to how long the fight lasts. As for prisoners, the French ones will go the North Africa I imagine, and the Belgian ones probably to Britain. Be worthwhile at some poitn to have a look at plane losses and compare: recall that ITTL the fighters held back OTL are committed to the front.
Which means the Germans are unlikely to recover many experienced pilots after they overrun France, (I'm going on the assumption they will or this TL might be pretty short.) unless at the minimum France surrenders and turns over captured German pilots held in POW camps in NA. If the loses are high enough I don't see how the Luftwaffe would be all that effective if changes are not made.
Given the political structure of Nazi Germany I'd expect the Luftwaffe of doing the eastern front Stuka analogue in this case no matter how long the fight is as if it proves a worthy design they can (well try to at least) make the claim that it was their planes that made the defeat of France happen.