Overall this is as smooth as an event can go given all factors combined.
======PROS======
•Good involvement
•Great soundtrack selection
•Good scripting both in map and sequencing
======CONS======
•Player "Control" fell apart quickly at the end
•Fairly massive "World Situation Change" (Class-X Breach)
===SUGGESTIONS===
•Plan "Area Focusing" methods.
In the event that player characters are faced in a situation of panic, and given autonomy, they are quick to go loose and run around the world. Try controlling this by locking down areas or establishing pre-set leaderships/hazards to deter roaming.
•Question: "How will this affect our server in the long run"
Oftentimes great events come with great ideas, and lead to dramatic changes in the way a server is experienced. Always think of how drastically your event could change the "base game".