I am not even on Stormblood content yet and I can't advance my class quest because it's an instanced event. Here's what happens.

1. Try to get into instanced event and get disconnected
2. Connect back onto server and wait in queue
3. Game tries to log me in and then kicks me out with error 90002
4. Try to log back in again and go back into an even longer queue
5. Repeat steps 2-4

I guess it doesn't make sense to have separate servers for low level instanced contents but this game is at least 5 years old and this is the second expansion pack so there should have been some anticipation of server congestion. This is nuts!