Oh, the decision behind Viera hair is a "???????" in my mind. At one point, in 1 single interview, YP was like "Yeah, we'll give Viera some of the shared hair ... but only SOME and only the ones that work on them!" and every since then he changed it to Viera only getting Viera unique hair. His first statement makes sense, there are a number of hair styles that they made with zero regard for accounting for that type of head. But there are a number that wouldn't look any stranger than they look on Miqote, more true for most of the ones this
expac. Perhaps his his statement was a mistranslation, like the "wolf head" for Hrothgar.
But no, I don't think they would get shared hair with other races unless they were straight up Miqote 2.0 so I'd still think it would just be racial hair like Viera. If they do have a more human like face/ head as the art looks like it's trying to convey I'd assume all 4 faces would be like that as I'm fairly sure none of the Hrothgar male heads have unique facial controls compared to each other but who knows. Regardless of which way they go they would only have to not make massive differences in ears and forehead to make the racial hair fit every female face.