Dreads won't be added till 2.4 though, every new hairstyle exclusive to one race isn't open till the next major patch. So..... that doesn't really apply as the reason for no dreads yet.
Only if you want to pay for items only once and not anymore because it would count as account wide bonus items
Vanity is good.
Vanity don't mean F2P.
ARR is not the only P2P game with different hairstyles and different gear models with the ability to change hairstyle and gear without buying them.