We arent getting a new race. And at this point it is too late to come with suggestions for Stormblood launch content.

I hope we wont ever see cross bred races. Why even have different races if everyones going to be a mongrel anyway.

The latest animations added have all been similar for each race, so i dont see SE making older emotes available for all, with a few exceptions of course. As for Highlander animations on a midlander? Its easy, as they share the exact same skeleton for animation rig. So its literally just adding a new number to the list. For other races it wouldnt be that easy as it would require refitting for all races with their diffrent arm lengths, proportions etc.