yeah they legitimately are bottlenecking this intentionally.
Quote:
Players on certain Worlds are unable to enter instances due to congestion.
Currently, players progressing through the main story quest of FINAL FANTASY XIV: Stormblood are unable to enter instances battles due to it reaching its limit of players allowed. Due to this, players are asked to wait until a player leaves an instanced area before they are able to enter.
While we have plenty of instances available, to prevent a heavy load on the servers, we are currently limiting the number of players that can enter at a time. If you are unable to enter an instance, we recommend waiting and trying again at a later time.
We apologize for any inconvenience this may have cause.
Yoshida's response was "just wait". This is a case of horrible design tbh. A 10-15 minute single player instance an hour or less into the MSQ? Why?