Literally this -
I would be for story for both show casing High Elf story on both sides, whether about the Wayfarers for VEs or High Elves returning to Quel’thalas under the Blood Elf banner like Lanesh whose been present w Blood Elves since MOP.
They could even go so far as to give both a racial like the Eredar for Draenei get, where it’s changed slightly to nod to the fact. Or just let both sides have a sub race system access to changing the name.
But all in all there is a well put together thread already High Elf Customization Thread (Legacy of the Quel'Dorei)