Nothing to be disappointed about it really unless you made the mistake of comparing the creator to other game's rather than realizing that they did say it will be revamped but they no way stated it will have a ton of options. The only "new hairs" would most likely be the old concept of using other race's hairstyles on a different one that never got implemented.

Also yes I agree with this:

No offense here, but I really hope the developers don't get hung up on this sort of thing. It's like every piece of information that comes out of ARR results in the most nitpicking suggestions from some people in the community.
So they can implemented the "hundreds of hairstyles!" I guarantee they made a sacrifice to something in order to appease someone that will only care for their hair selection for a day before no longer noticing it while playing.