I’d say that rather than finding an executive to fire/blame, we should focus on getting the executive team to make changes to prevent this in the future, and give them our best info/advice. Same reasons you don’t fire a CA for making a mistake, but you ask for an ASAP report to get data that may help prevent repeat mistakes.
Side note, I think they need to throw some cash at gate/ticket agents to get them to stay. Too many have quit this week. I fear we may not have enough to escape serious disruptions from this in the near future.