Having cut out 3 of the 1945 aprons, without trying the pattern before cutting apron 2 and 3 (I will learn eventually), I felt that I should aim for a less grandmotherly look with the next two versions, without using too much more fabric.
Longer skirt (by adding ruffle to bottom of skirt)
More skirt fullness
Folded over pocket
Smaller chest ruffles
This evoked less laughter, but was still voted "grandmother hips"
Kept longer skirt, folded over pocket and smaller chest ruffles, but removed most of the added skirt fullness, the contrast waistband, and shaped the skirt at the back. This was voted slightly less grandmotherly. In fact it was "almost cute" according to the teenage fashion panel.
Emboldened by this partial success, I made proper use of the apron and spent the rest of a rainy Sunday afternoon baking with my son. The house smells deliciously of chocolate cake and fresh bread, and I have no regrets about failing to cut out the toile for my coat.