A tail-tuck option that hides your tail, similar to the hat-hiding and mainhand-hiding options we already have that are saved with the stored gear-set, would be nice. There's no reason a Miqo'te or Auri character couldn't keep their tail under their skirt or kilt.

That said, it might involve altering a lot of character animations. So i have no idea how much effort on SE's part this would take.