For the database stuff you would want to refer to the previous posts on it.
The old database structure was built for regional application in 2000. They tried to use it for a global scope in 2021 across all platforms. Some portions of the architecture had single process bottlenecks.
It could not handle the volume of data thrown at it. Resulting in crashes, being down all day, lost progress, lost characters, etc.
They had to put in some temporary measures to keep it stable, like a login queue and game creation timers.
They said they would be working on the architecture programming to improve things - but you don’t want to touch a Live database like that. It could really mess things up. The changed database programming is to be tested on the PTR first. If it works, it may get us to the point where those temp restrictions can be removed. Would be rather nice to have before ladder.
That means people can, and should, try to break the database testing PTR!
Changing the database structure that runs the game is a rather big deal. You don’t want to be trying to test too many things at once. They need to make sure the database is reasonable stable before doing the content testing. I would guess the content testing will build on the initial database PTR testing.