I think it's very cruel that Yoshi-P announced "no new races" and then dropped Meteion on us. Him saying it's up to us in the new liveletter though gave me hope. I know a lot of people feel like we don't need new races, or we should get Viera and Hrothgar fixed before adding new ones, and I understand that sentiment and agree with the viera/hroth stance. However, I still would love to see a race with little bird wings on the sides of their heads and cute bird tails.
Fair warning I don't know how modeling works, so correct me if I'm wrong, but the wings could have a similar placement to Au Ra horns so that the bird race won't have to suffer from the hat curse viera and hroth do on arrival.
There could be different wing types, like the ones Meteion has, or wings shaped like Melia's from Xenoblade. The wings/tail could be their own color separate from your hair color, or tied to it, but I'd personally prefer the option to have the wings/tail be a different color from your hair (and if you want them to be the same color you can just select the same color). I love my Au Ra, but I'd gladly fanta into a bird person... we don't even have to give them those talon feet that Meteion has, since I know that'd be a headache to work around and it's honestly a whatever feature to me.
Also, even though Meteion is technically a species Hermes created, there's nothing stopping it from being possible that bird people can exist as shards. Humans got turned into miqos and hroths and roes, why not the birds too? And in enw there's already a bit of dialogue for the furry races where they call you an adorable creation, so it's not like it's earth shattering for you to be a bird person when you go through the story.