To anyone who didn't see the live letter or who wasn't paying attention, the hairstyles, hempen sets, and butt slider stuff got addressed by Yoshida.

Hairstyles: They plan on making SOME hairstyles race unlocked, and SOME of them remaining unique to that respective race.

Hempen sets: In order to make this happen, they would need to make the clothing ID and skin ID to not be so different and rather, indifferent, so it can happen.

Butt slider: He will talk to the graphics team about this and see what can be done, but says it in a very joking manner. (so, it may actually happen)

Customization (more face options): Character data is sent constantly back and forth between the game and the servers (JSON), which deals with packets. If they added more customization, it would increase packet size, causing stress on characters and the game.

If I messed anything up, please let me know.