As a single chapter is not that bad, well if you compare it with the rest of the second cour that is. But as a final chapter is really, really awful it feels too rushed, there is no real conclusion. Probably the only positive thing is the "resolution of the triangle" and still Freyja is going to die in less than 15 years as she is already having signs of Windermerean premature death.
There is no conclusion of Epsilon and what they surely stole of technology from the Sigur Valens, and Windermere is still in war with NUNS.
Also there is some words about this having a movie to wrap up things? or is going to leave those loose ends?