Well I can see some of us think changing the slug might work and some like it as is. Nothing wrong with that.
These are just ideas being kicked around. Many of the great new bits from AnH-R originally began as far fetched ideas way back when, so you never know.
One reason I might like to see the slug altered a bit is that a new mouth (or something like we see in the mock-up) looks a bit more like a cave opening. Another is that it's way more disturbing looking and less puppet-like. As I mentioned earlier the inside PoV when they are escaping (as we've also seen in rough mock-ups) could be great as well.
"But it's Adywan's call."
^^ Exactly - Ady will either consider it or decide to leave it as is.
I'm good with that either way.