They have been unhappy with the org for a long time. The teams may of placed worse than astralis at Cologne but these players are obviously looking to the future and believe they can make the team they're joining better than the current astralis.
device and dupreeh have been teammates for ages and are good friends. Dupreeh speaks Swedish, has swedish gf etc.
Magisk can reunite with his old teammate k0nfig where they really made a name for themselves at the same time.
Xyp9x can once again play with a former teammate in karrigan, FaZe require a hard support/role player.
and obviously gla1ve has a child on the way but he and zonic could really go anywhere and would instantly make a teams potential very high