Should nightborne be a full playable race? or would you prefer that to go to the likes of ogres/naga/ethereals etc and nightborne instead a playable sub-race if those become a thing.
Summarised Background
For all who don't know, unlike current modern day night elves, nightborne are ancient nightelves who remained in the pre-sundering arcane Nelven culture and civilization (minus the madness that characterised the end of Azshara), these night elves kept on advancing hidden away in their ancient city, and came to depend on their pure source of arcane energy, called the nightwell through which they evolved
They are very arcane and very royal
They are not like blood elves who formed a new society and very distinct appearance but rather are ancient night elves with new bodies.
They are not true night elves any longer like current night elves, but have evolved.
Nightborne are the first new night elven based elven race since WC3, but lore wise they're not new, they're actually very old, they remained in the old night elven ways whiles the current night elves chose to become druidic.
It is worth noting nightborne are not addicted to magic like the blood/high elves were at all. They are instead dependent and reliant on their Nightwell as a source of nourishment. Over the millenial the nightwell source has become corrupt causing nightborne who do not feed on it to starve like you would if you don't eat and transform after a few months, turn into mindless corrupted creatures called Withered ala inverse Sunwell. This plays a central role to their story arc and why they are in the situation they are in currently with the Legion and why you fight with their resistance.
It's worth noting nightborne could go either way, like forsaken are based off human and became a wow race, and like Worgen also based off Human but are a separate race, so to could nightborne.
Similarly, as Ice Trolls or Zandalari are based off trolls but remain a sub-race of Trolls, or Yaungol are too Tauren, Earthern to Dwarves, or Mechagnomes to Gnomes, so too are nightborne to night elves - blizzard deciding to do something new for these ancient night elves.
Short History Background Clip