I am not Flight Deck nor Cabin Crew, I am ground staff for many years and a frequent passenger. I would rather have the VS crew in command of my flight than PT6A.
I am quite certain that all aspects of the evacuation will be examined and in due course a report will be issued with recommendations for future situations.
What is clear is that the VS crew felt an evacuation and not a disembarkation was required. They were there, they know what all the indications were and they took a decision based on those real time indications. I'm sure that if the indications were different they would have followed the manual, but equally I am prepared to accept that the manual procedures were not relevant and evacuation was the correct solution.