#8610 Si lo explican en la noticia, dura 1 dia por esto:
This maintenance will introduce a new structure to the instance system that automatically adjusts the number of available instances according to the level of congestion. Until now, depending on the time of day, the number of players would become concentrated in certain content, maxing out the number of available instances, resulting in extended waiting times for players despite having a full party. With the implementation of this new system, more players than ever before will be able to participate simultaneously in the same content.
Because the implementation of this new structure will require a modification to the very core of the instance system, much time will be needed for checks and verifications before going live, which is the reason for the extended length of this maintenance.
Que es a lo que me referia, que cualquier juego cuando tiene que hacer un cambio asi, se tira su dia perfectamente.