hairstyles are just cosmetic stuff, just design your character the way you want him right at the start and its no problem. Seriously though, are we really complaining that it costs you money to get the option to get hairstyles for ALL YOUR CHARACTERS but then also you have to pay to change the way you look because you do not like it. I for one, do not at all think this is important, nor is it cheap. It is a cosmetic luxury, if you don't like your hairstyle now but don't want to "give in" to spending cartel coins for it, then wear a hat.
For a game that focuses on story content (which is about your character) i think its ridiculous they charge cartel coins to customize your character.