There are many people who were unable to participate, and were not able to be on in the small time frame window for the last phase. I have followed this game for 5 years, and very excited about it, but it frustrates me to know that because of work, i am unable to experience the last phase of the event.
It would not be difficult to make the chest a single loot event, preventing people from farming it for gear. This would allow it to be run a few times over the course of the day, allowing more people to experience the fight.
One very frustrated gamer!