First, this was the 2nd time they have had this event. Last year it was held on Friday, Sept. 13th.
From what I'm reading, it appears someone, or lots of someones dropped the ball big time.
The biggest thing that I think they didn't do was cap how many tickets they sold to the event. Others are posting that tickets were still being advertised the day of the event. The Halloween and Christmas parties have a definitive number of tickets, this apparently didn't.
Also, they need to educate their CMs as to who they are the line for (character wise). It seems the CMs were put at the queue and had no idea what the queue was for.
If the event is to get another shot, they need to be more thorough with their planning and diagramming of what is going on. The end results from last night seem to be rather disappointing across the board, but there were a few successes too. Overall, they need to redefine the point of the night and start over.