Suggestion for the event, if GMs are reading this deep:
Adjust map and map size according to event count for each level group. So, if 45-48 hits over 50 people or whatever number you choose, make the map change to a larger map instantly (just like instant port on level).
The current map is a bit small when too many groups are present, and our group even had people porting literally on top of us since there was no open space left. When there are less people in the level range, the map works great, but there is a limit to that map size. I saw over 100 people in 2 zones at once on a couple occasions, and there was no where to go without standing on multiple groups at once. Great event though!