Actually, as far as races go; I don't know the name of these guys, but in Limsa Lominsa I've seen a couple of reptilian NPC's. They're about the height of an Elezen, but have a really interesting look to them. Granted, they seem a bit "passive-looking", so if made playable, I'd probably recommend adding more tough-looking customization options, but regardless, they look pretty cool. Only issue would be, they would probably need to have a lot of armor custom-fit to their models, which would mean a lot more work, but I could really see a race like that rounding-out the current race options.