Smart Cookie, my point was, that while the shells are form fitting (the main function seems to be not be wearing baggy sleeves) the overlay is loose enough that I don’t see it as a tznius issue. It’s not just there are greater issues, but this is one that isn’t an issue. To me, it’s not the style per se, it’s the particular top one chooses to wear.
And yes, by and large the only older women I see wearing them are the slimmer women, who tend to dress trendier, but again they lok fine too.