~~~~Why?~~~~
Not because of clipping issues certainly
*points at the fairytale princess dress*
It used to be that if a hairstyle was unavailable to players it was attached to the mogstation gear set when it was put up for sale.
My Original Minfillia wardrobe had it
Thancred HW gear had it
Y'shtola HW had it
And so on
Lyse gear doesn't
My new dress doesn't
It's really the only thing that has made me not buy them
No new hairstyles to play around with, and I don't particularly understand why they aren't including them except out of pure lazy, they are still happy to charge me for my dress but they won't allow me to wear my hair long?