I mean, I don't think there's much else to say other than the title. There is no reason that the hat should always be invisible on the Viera.

The ears could fit through ear slots like the Miqo'te's do, or they could fold back. Or better yet the option for both? Any of those solutions would be great. I'm just missing out of a lot of really cool looks because unless its glasses or a mask, headwear is permanently invisible.

The Choral attire, the red/blue mage outfits, or really any other full gear set just feels like its missing something. It's just a bit of a bummer, tempted to swap races because of it.