I think the event was pretty exciting! It gave players a reason to PvP and to try and gank the other faction of its World Boss they were currently trying to defeat. I also noticed that all of the perks you implemented into the event increased the activity of dying/dead servers, which made PvP a whole lot better for those servers.
Reading through all the responses, many players have already taken the pros and cons I would have posted before them.
As for a future in-game event... Krayt Dragons