I assume you meant to write uninformed, not uniformed.
Let's be honest. Whichever muster drill they do, some passengers will be able to perform in a real muster while others will be in a panic. But, IMHO, what really will be needed is crew members who can perform their duties and get passengers to do what they must. And for this the training in a real old fashioned muster drill with real passengers would seem to be a necessity.