Some women want to dress fancy, some women don't want to. There are always plenty of people on either side who will try to put all women in a bottle, so to speak, but the truth is that women come in many flavors.
I think having a variety of armor designs across all venues, with the default looking the same as the current armor would do best for drawing in female gamers. Some would try out new suit designs, some would stick with the default or ignore that aspect, some would incessantly change to new styles, and some would rage about other peoples' style choices--but everyone would find something compatible with their play style.