God does not change from day to day as to His feeling about moral sin. Women wore veils also. Unmistakable, visual, identification of the sexes. Pants are not necessarily more modest than a skirt. It is interesting that every generation of women before us learned how to wear a skirt modestly.
Some women are immodest in a dress because they're so used to pants.
Dress length, blousy culottes that appear as a skirt is a possible alternative. I feel this meets the distinctive quality. The Jews survived 1,900 years without a home land. This book brings out tremendous historical reference that this seminar does not have time to cover.