That's why they would just do the idle stance. You stand upright when still , but moving or casting you go back to your normal animations.
that and the fact that you will have no bones showing, and proper hair/eyes, is different enough to look like sub-race while still being clearly identifiably forsaken.
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that's like saying that for naga or satyr.
they are completely different races now. both biologically and culturally. Naga or Satyr may have once been Elves, but they are no longer. Night Elves may have once been Trolls, but they are no longer, New species entirely
Night Elf sub races are technically: Nightborne and High/Blood Elves,
- they are genetically the same, minor superficial variations, even less so with nightborne
- we consider high/blood elves different only because they're playable and they are culturally quite distinct. Having different themes, like day/sun theme. SKin colour is the opposite, also distinct enough.
- nightborne we accept as a full night elf sub-race because they are thematically and culturally the same, nightborne merely being the half of the night elves that continued practicing arcane magic fully, they are only altered slightly in appearance.
Nightborne changed only a little, high/blood elves changed alot but they are at least all still biolgoically elves, with nightborne more a subset of night elf with high/blood elf being like an opposite. However naga/satyr are completely different.