Not sure how I missed responding to you, Nightlit. Paying respect to the fallen is a stabilizing force. It gives the people focus during a time of transition. There is leadership of a sort, and while it's not unified behind the scenes, it is non the less present. The remainder of the council focusing on who they think should lead, while ignoring the needs of the pack to come together in this tragedy, could destabilize the entire pack while fostering division and rivalry. Possible leading to fractures that cause a breakup and weaken everyone.
The Hunter Corps is like a police force. They are not the pack enforcer though. That position is ultimately responsible for the alpha's safety. Just like with a police force in any city, they can't be everywhere and see everything that's coming. A criminal can always find a gap. Dorian's position didn't require him to set with the leadership. He was likewise off duty when the shooting began, but took command of the situation as soon as it happened to resolve and hunt down the assailant. Had he been standing with the leadership, odds are a bullet would have found him.