For all the commotion about the new inclusivity options, I don't think a lot of people have realized that this now makes races like Sethrak, Ethereals and Jinyu VERY possible to be playable. Even Arrakoa and Drakonids!
In the past, these races have never had female models (no, Sethraliss is not the "female model") and instead have shared a singular model that uses masculine and feminine voices.
While in the past we have seen females created for previously singular-model races like Eredar/Draenei and Worgen, that hasn't happened in a long time. But now, for races like Ethereals where it would be odd if an energy mummy had tits and an hourglass, or Jinyu/Arrakoa having boobs for no reason, these races can be added in with a singular body type with lots of options like Dracthyr.
Voice selection can let people choose a masculine or feminine feel, as well as possibly a few small body type choices like Dracthyr. And overall its half as much work to focus on one body for animations, meaning that it's more likely for Blizzard to do.
tl;dr Dracthyr and the new inclusivity options make it more likely for fan favorites like Sethrak, Ethereals, Jinyu, Arrakoa and Drakonids, which lack dimorphic forms, to become playable. And i'm sure I'm missing some others.