I'm pretty sure every character creator will still have 10,000 styles of straight hair and maybe 3 (if we're lucky) styles of afrocentric hair.
You'll say, "but what if devs want to tell a specific characters story?" And I'll refer back to the upcoming AC:Odyssey where the names are already determined (Kassandra and Alexios), the story path is already determined, so what would be the harm in letting me change hair style or color? Skin tone?
Even if you wanted to argue that "they have to look Greek!" that shouldn't preclude customization wholesale I would think.