That doesn't mean they wont!
Honestly I can see them wanting Ellie to do it, it causes a bit of a Buzz will she manage it?
I suspect in their heads it doesn't seem to be as risky as a lay person might think, they have said themselves that was the only time it went wrong and even in the video their first full run through was done directly on the floor no mats in sight.
They were telling the truth it did end sort of end how it was suppose to just messier although admittedly that's only because Vito caught her as she fell the man has fast reflexes!
When do they usually announce the dances, early new year?