I think Austin has already made himself too valuable to fall down the depth chart. If anything, the coaches have be wondering how to get him more looks, not less. So I definitely think he's supplanted Hurd as the third guy.
He's everything we want in a complement to TO, at least in terms of physical skill set. He's fast, tall, explosive, can catch. Crayton and Hurd don't stretch the field nearly as well.
Defenses suddenly have to respect Austin after what he did last week. Not to the level of giving him too much attention, but his presence, you would think, could actually help free up TO and Witten. I mean, you know the Skins will be thinking, "Hmmm." when they see him on the field. That's something that will never, ever, ever happen with Crayton or Hurd.