Indeed, it looks a lot like a blood elf place, and it seems pointless to have the nightborne around, they should get rid of them and have the blood elves take over the place. btw, weren't all the night elves arcane, not just some of them? I thought the highborne were just the most powerful of the night elf magic users, I thought they all ditched nature to pursue their arcane curiousity, not just some of them. Wasn't it after the sundering that Malfurion led his group back to nature, but the others didn't have it - I don't know why blizzard brought the other groups back - they could have used the high elves to be the alliance arcane elves.
I think the horde/alliance thing really has messed up the whole thing - it's probably why you get arcane night elves, and now nightborne -- hmm, I've got it - the nightborne weren't made for just no reason, they are basically the blood elves on the night elf side ! - oh, that's why they are so similar to the blood elves, they are giving the night elves the blood elf treatment.
Do you like that? it's a bit funny since the night elves have looked down on the blood elves for having arcane addiction issues, and now their ancient city is full of nightborne elves having a much worse case - lol