I literally mentioned Darnassus was the only exception, and again, it's just a part of Darnassus. Only the Temple of Elune and its surrounding are a throwback, the rest of the city follows the same druidic aesthetic every other NE settlement follows. It's pretty bizarre how you dismiss Lor'danel and Sylvaanar as outposts, when they are the ones consistent with the modern NE aesthetic as a whole -which show no signs of changing, at all- rather than ONE district of Darnassus?
Because there's nothing to point out they would even want to! The failure of your premise is presuming that because they have allowed arcane back into their society, they are going to roll back all their cultural changes and go back to an imperial aesthetic, which makes no sense to what they are now!
Night Elves spent milenia distancing themselves from their imperial history, and not because you prefer those aesthetics is reason enough for them to roll back. Like for real, do you even like night elves for what they are, or do you just like them for what you want them to be? Because IMO it seems you just like the Highborne, which would be fair, but you keep trying to make the NE's something they just aren't.
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Has anyone confirmed this in game? cause IMO it seems more like a string name change considering there are new strings for jewelry up the list so IDK.
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Black hair has been on the data for VE's since legion (that's how some NPC's use it, also true for other races, it loads in WMV as a normal hair color) but IDK if Stiven's program differentiates between NPC or Playable options.