joseph, we are talking at cross-purposes here. A miniskirt is-as you write- not zniusdk and should not be worn. Absolutely. I don’t whitewash the znius question at all. If my memory still serves me right- the Bach and the other acharonim allow any piece of clothing of a man if it is not an important beged. For example- long johns in the winter. “Lefi anyus daati”, this would not be considered ‘lo silbash’,even if they were men’s long johns.They surely are not an important part of clothing and are worn to fend off the cold. Culottes- a kind of combination skirt-pants, is ONLY worn by women and is actually quite zniusdik should be allowed. Pants UNDER a skirt (such as soem yemenite women wear) should be allowed.It is zniusdik and it is surely not a ‘beged ish”.
Please remember that the Bach is talking about a beged who actually belongs to a man, unlike my examples where they are absolutely a woman’s garment.
Look, I am not here to pasken and the acharonim whose teshuvos you bring have their reasons for the issur. My main point was that it is not ‘lo silbash”. Simply put ,if all these pieces of clothing would be actually “lo silbash” I am not sure thet Bach and his followers could say it is Ok. Additionally, there is also a hetter of “the community’s customs” (lefi minhag hamokom).Look it up.
Anyway- regardless of our different political views, I respect your knowledge, If you have a chance, look at the Bach. it is very lengthy but it will be worthwhile. (You can also check the Taz and the Shach subsequently, who follow in his footsteps.)