Perhaps you could have that as the normal option, but then through your ties with the Dark Brotherhood/Thieves Guild you learn that he can do more than that. When you approach him about it then the new dialog comes up that allows you to change facial features.
exactly! I mean, the idea that you could use surgery to remove bounty is a great idea, and I'm not against the surgery function (as long as it works with the lore), but I really don't want to have to go to a surgeon just so I can cut my hair.
It would be amazing if we could have both an ordinary barber in e.g. Solitude and the surgeon in Riften!