Here is all that needs to be said about the Nightborne: Nightborne: The Fixes We Need by Valquois
Honestly, all of the first wave Allied Races need to have more options made available to them. Highmountain Tauren, Lightforged Draenei, and Void Elves need more unique characteristics considering they are copy+paste jobs with very minor embellishments.
I refuse to believe that Nightborne were released finished. It just screams of rush job/we had a deadline to meet.