Capt B - From my reading of the AAIU report, the Captain initiated the “Rapid Disembarkation” procedure which is an SOP in Aer Lingus which is, in effect, a halfway step between a full evacuation and normal disembarkation.
This captain seems to have followed the procedure prescribed by the airline and approved by the authority (IAA). Now, whether or not this procedure is adequate or not, is an entirely different question. From my reading, the crew handled the emergency well and may have been let down by an ambiguous procedure which led to confusion in the cabin.