It's possible that the headgear and hairstyle situation will never be resolved. Elder Scrolls Online has two beast races and due to the different shapes of their heads, they can't use some of the same helmets and hairstyles as the more human-like playable races.
I'd expect a similar issue to be the case for FFXIV's development team. There's some stuff they can probably make work, but they'd likely have an easier time just making the occasional new hairstyle exclusive for Viera and Hrothgar.
I don't think the situation means losing out on the missing genders being added, though. Or rather, it shouldn't in an ideal world.
I already have a love/hate relationship with headgear already. Some it looks really cool but then if I'm wearing it, nobody can see my character's face!
