I especially wouldn't take that piece of art seriously though, as it was just a big April Fools Joke by the development team back during the Beta Test (when the forums were constantly going on about wanting a new race in the game (this was before the au ra had even been thought of), and because players were constantly requesting the Ivalice games' bangaa and viera races to be added, the development team jokingly fused them to create the vianga race, which that pic was supposedly 'super confidential concept art' of. Except it was a giant piece of humbug on the development team's part.

No doubt the Scions' 'eye' symbol appearing on it was just a means to further the joke in ways only Yoshi and the rest of the development team knows.