KMS does this.
CMS does this.
Not sure if SEA does this.
The point is, why don't we try to have every player get involved in contributing to the game so that when a huge update comes online, such as Override, we can at least minimize the number of bugs in the game? This will for sure minimize this ridiculous amount of "Unscheduled maintenance" that we are currently facing.
Nexon, be serious, you cannot just let your players wait every single time. You know that this is extremely disappointing right? Not to mention that GMS makes many "unique" decisions such as not to import rebirth flame where everywhere else has this feature, and having our version of the game be the slowest among all the servers around the world.