It's an interesting idea, but a better way to describe it would be:
The Vulpera use the Vulpera Rig which was the Goblin Rigging structure for animation-retargeting, modified with a Tail and Facial Rigging.
In the future, Goblins will be using the "Vulpera Rig" but have no model attachment to the tail-skeleton, so it will invisibly wag behind their ass we just won't see it.