If the pouches had a tamper evident tool-less ripcord to open it in the event of an emergency, I think that would resolve the concerns about a Bataclan scenario.
I'd never thought of that. I would have accepted that situation if it had a rip cord and not had been happy about the requirement. However, I'm very confident that it'll never happen as that people will pull the rip cord to record. (Heck I would probably obey the rules and pull the ripcord right before handing back the case to remove the phone)