Interesting! Although I do wager people who played Vanilla may have been a little more exposed to Drakonid humanoids, given their presence in the memorable raids in Blackrock Spire.
I suppose since the Dragonflights often had Drakonid guards and that they lorewise are regular mortals ascended by the Dragonflights, perhaps that's exactly what we're getting? Dragonflights need help, so they ascend some of us to Drakonid form