Taken from the ask-us-anything:

Q:As the constantly changing person as I am, I tend to always want to change hairstyles on my characters in-game after a little while to make it match a certain armor, or the likes. So, my question is: will it be possible to change your hairstyle or other appearances (like tattoos) in-game after you have created your character? - Therese Str?m

A:For the initial release of the game, you’ll only be able to select hairstyle and adornment choices in the character creation screen at the beginning of the game. We hope to provide enough options to allow you to create a unique avatar. But we feel the same as you—over time, players want to change their appearance as they develop their characters, so we do have plans to release additional hairstyles, tattoos, adornments, etc. in post-launch content updates.

Well this makes me a sad turtle.

They said they understand how people would want to change and why, and would like to add it soon. They confirmed a later update fixing the very problem you're going on about.

Cheer up, emo turtle.

they made it sound like they were only going to add new styles, not make a patch for it. IM probably being too nitpicky

"so we do have plans to release additional hairstyles, tattoos, adornments, "

Unless you are mentioning somthing from a different source than the AUA.

"But we feel the same as you" is a very strong hint that there will eventually be a barber, tattoo parlor, and/or face sculptor. Or their equivalents. Granted it's not promising anything, but no dev with a clue would.

I approve, an appearance changer is always welcome, and in my MMO experience, widely utilized.

" But we feel the
same as you—over time, players want
to change their appearance as they
develop their characters" Meaning after already created. Lay your worried to rest. It will be added later.