What happens when "early access" is "cancelled" by server fail?

[Vahlnir]

The only thing worth being concerned about is the instance server clogging, depending on when/where they put the first instanced content in the story. Past couple expansion, seems like that's been the only major bottleneck.

They largely avoided that with Shadowbringers. There are some instanced battles but they weren't implemented at the very start of the expansion like that one was in Stormblood. That helped alleviate things a ton.

[Arazehl]

In Stormblood the bottle neck that happened with Raubahn instance duty was due to the fact of poor planning. They had placed that instance/encounter in the very first new zone (Fringes). It easily capped out right away and the queue to get in was massive. Players were left with little else to do to advance the story and get into Rhalgrs Reach. So we ran around Fringes doing Fates to gain exp.

Since then SE learned a lesson and with Shadowbringer's launch it was so much smoother. We can hope this problem doesn't ever reoccur and things flows smoothly with EW EA. I hope they tested with EW how the game flows on a mass scale. If things happens it will be some other thing that got overlooked.

I expect the normal DDos attacks, much larger login queues and bugs in areas they'll need to patch. It's part of launches. I expect lots of lag in over crowded zones. I expect people to complain on the Lodestone when their internet or PC can't handle the loads and point fingers or when DDos attackers start their antics. Yes your new EW pony mount you get with EA will take time to arrive in moogle mail. I think best to just expect the worst and hope for the best. The new expansion isn't going anywhere.