A public social media post by John Heald of Carnival, in response to this question:
Well, as I mentioned in my video safety comes before anything else. Nothing, nothing is more important. I know of no plans to do this and while I am not in a position to never say never I want to state again that the training our crew receive is constant and of the very , very highest order. I have no doubts having been on board in a real emergency situation ( Carnival Splendor Fire ) that our crew would no exactly what to do. And my other take from that emergency was the brilliant and total cooperation of our guests. I saw this first hand.
The new way of doing the drill shows guests where to go in a real emergency and how to wear the life jacket. And in a real emergency that is what guests have to do and from there listen to the Captain, listen to the crew. Trust the captain, trust the crew.
I think that the vast majority understand this and do not want as Warren does and a return to the previous way of doing things.