Ooooo fun time conspiracy theories!
All numbers reflected in the post are hypothetical
You have 20 servers, at 20,000 players each ALL BETWEEN 15-20
You have 200,000 people clicking the same instance quest SPAMMING it at hard as they can to get in.
What do you do?
Simple!!!!
You regulate the log ins. Allow 20% of the server capacity to log in and play for 15 hours.
Then you allow another 10% in at a time every 10 hours.
Voila - The level gap between players is now wider
Cause 100,000 People to be spamming level 20 quests scenes
100,000 at 25 and 25,000 at 30
This is a much better viable solution then spending the funds to upgrade the servers for a temporary problem
Edit* Hence the prolonging of EA, to put this plan into effect successfully!