first of all i want to say sorry for some typing errors.
After some researches i think the possibility of the ivalice moogles being a playable race can be something.
There is a post of Senn in the Male Viera Thread, where he put a awnser from a interview from Yoshi P where he say it's more easy for them to add a new race than create a butt slider or something that change a phisionomy of a exisiting race.
For lore questions i guess the best way is maybe, make then a different race with simillar physiognomies, something like the Ronso that has turned in Hrotghar.
Maybe they have alredy planned this who knows, why they don't used the ivalice design for Montblanc and Hurdy
But as they say, hope is the last that dies, so let's se what we have prepared for the next patchs that are for come.