I agree with the whole idea of introducing a massive FATE knowing the issues they had with Odin/Behemot is a bad idea, but, can you really think in a instanced event for it? For the whole server? I don't think that would work either. The FATE system is more flexible when it comes to introducing dynamic/temporal events in Eorzea. Also, guys, you must consider that this event will be up until December. All those FATE's and quests will remain active until that date, all the chapters will be overpopulated as they appear and the previous ones are doable because everyone already did it.