An Au Ra clan could have one set color of skin, and instead allow players to decide on scale color, which would be pretty sweet.

I'd like to see Lowlander Hyur and Meracydian Miqo'te especially. If there's Highlander and Midlander Hyur, and Midlander are smaller than Highlander, I think Lowlander would be the next logical step, and be shorter than both of the other two. Not sure how Meracydian Miqo'te would be different, outside of being more tribal, perhaps including some Babylonian traits to their society, considering they may be the ones who named Tiamat and Bahamut.

Forestfolk or Mountainfolk Lalafell would be interesting, with Forestfolk being more lithe and a bit taller than our two current clans, and Mountainfolk being more muscular and a bit more stocky.

Frostborn Roegadyn could be a group from the far, far north and have whites and light blues for skintones, though I have no idea how they would differentiate in naming scheme.

I agree on the Ishgardian Elezen, though. I imagine they would be like High Elves, taller, fairer, perhaps not quite so giraffe looking.