Final Fantasy XIV: Endwalker has been out for nearly a week, and according to the latest update from over the weekend, Square Enix is still experiencing server congestion but there have been some improvements and greater stabilization is happening.
According to the update, what they’ve seen is that while large numbers of players are logging in over the weekend, because it’s not early access or the immediate launch crush, some people are logging in at different times (or possibly having completed the story by now), are logging in in different patterns.
One thing the team did on December 7th was to add more capacity to the queue. When players who were encountering a queue that had reached the maximum number of people waiting, they would see error 2002. This quickly memed error was the bane of many Final Fantasy XIV players' existence for at least several days. The error 2002 is still happening when more players try to join the queue than the queue can hold, making longer possible queues, some shifts are helping. With the capacity increase, and disbursement of players to different times, things should continue to stabilize and get more accessible.
Since the company has not yet been able to complete the server upgrades and new equipment that was promised due to supply shortages, these small changes have at least been able to let more players join queues and log in. While there have also been additional errors and outages the team has been updating and addressing these, including via an emergency maintenance on Friday.
Another error that the team is encountering is players who have not entered their full game registration codes are seeing their access disappear because early access has ended. For the full update on the server congestion and the changes the team is making , see the update over at Final Fantasy XIV.