Square: You need to open servers before this community is slowly choked

[Mwynn]

Its not necessarily a server issue, but a network one. You've seen people mass DC during Odin? Thats not because the servers can't handle it, thats because player machines can't handle the amount of players in the area.

Strange how People get 90002 Error at the same time then, eh?
Framerate Issues won't Disconnect you, atleast not if you have 20-30 Frames due of a crowd.

Simply said a Zone can handle only a amount of Players and Monsters, if that Limit exceeds you can kiss 1/4 of those Player Connections Goodbye.
(Hence we had multiple Instances of Zones at the start of Stormblood, because of the amount of Players basically overfilling a single Zone)