They haven't yet to my knowledge and I am unsure if they will even bother. They don't seem interested in specifically confirming or denying what exactly High Elves are doing. They haven't touched Telogrus on the alpha/beta at all, so right now it seems like they are leaving things up to our headcanon.
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Ion said they plan to make generic npc's use the new customization options. They are not going to change Auric's faction from Alliance to Horde. I am pretty sure Ion specifically said they weren't going to change established NPC's much if at all.