SO:-
Even a modest fleet of nazi heavies and the threat or actuality of London being flattened may have led to a de facto truce in bombing cities.
Well they certainly missed a trick in not being able to reach all the relocated T34 factories in Siberia, I'll agree. Not clear though what difference it would have made to London with the Luftwaffe being short of heavies. The problem was that they were mercifully short of everything, especially with the launch of Barbarossa. A strong force of Heinkel 1-11s retained in France would have given us even more sleepless nights than pertained pre D-Day. Thankfully they were needed elsewhere, and as ever in far greater numbers than there actually were. Goering was second only to Hitler himself in ensuring ultimate Allied victory.
In the meantime, much sympathy to the good people of Augsburg for their spoiled Christmas. As has been pointed out it could have been a disastrous one instead had it not been for the skill and courage of those who made this cookie safe.