I've noticed that when I'm riding either my Chocobo or Unicorn the animal is animated but my character is stationary. I think that a more realistic animation should be produced which would include the tail blowing in the wind and the character moving with the animal while it is moving would be a seemingly small improvement but would have a large impact on the realism of the world.

Another thing I've noticed is that if I'm standing on say the top post of the railing over by the Scions of the Seventh Dawn base my entire foot will disappear within post. This could be improved by making the character's ankles adjust to the angle of the thing they're standing on. If you're on a slanted roof, your ankle will be angled to keep you straight. The same should be done within the game. This will help with realism as well.