It's because of clipping issues. But I'd want longer hair on female characters. And more volume on the head, not they all look like wet wigs on your head...
The longer the hair, the more clipping issues it will have, and then some people will complain.
I'd like to have hairstyles of different lengths, too, but people would have to buy them with the understanding that they will clip on things like armor, staves and shields.
I posted this pic in another thread, not to complain about it, but just to remind people that clipping issues happen.
I'd like more hair styles, but every time I'm making/changing an appearance I think "why are there so few decent eyebrows"
There's basically like 3 that I've ever considered using, due to most either having odd shapes/proportions or sitting too low on the brow, (like upper eye-lid area). 3/4 of them are sorta cringe-worthy TBH.
Are you serious? ZOS still hasn't even implemented the facial accessories and jewelry correctly over a year later. Constantly unequipping going in and out of dungeons, etc.