sechel: I argue that tznius was never a focus
I agree. Tznius was never a focus, just like breathing was never a focus. ALL Jewish women were automatically tzniusdig (as were many women in other cultures, lehavdil) so there was no need to focus on it. It was only once fashion became a focus, and when the world became more permissive Rachmono litzlon, that tznius among women started going downhill.