Ok so, Regarding this Early Access, i feel like we are passing the final phase of the beta, lot of mainteniance for these congestion problem, well thats not even that shocking considering the "NA-EU" servers are used Worldwide... since honestly, no one outside the Japan will join a JP server.
So yeah dear Square-Enix that was one of the worse Early Access i ever played... well i could say... i barely played since i was not able to log-in in Excalibur for most of the time... like everyone else afterall, and when you was able to log in the instances was down.
So yeah seriosuly, damn just shut the server down for 10 hours at this point but fix those problems once for all. I still cheer all of you Developers up, but this is disappointing specially for who preordered the game specially for the early access.