I think the series is fumbling a bit here because of over extension. Especially after the dramatic conclusion of the last, for all its drama, this one is a bit episodic. (I think it picks up a continuing thread toward the end for the next books.)
But we have adventures on Earth, where people try to assassinate or exploit their venture, the discovery of a plot to foment dissension among the armed forces, a mission, nominally to contain a refugee problem, that actually goes much deeper, and finally a discovery of what, exactly, the civilian government is up to.
This includes some fancy footwork with orders, a discussion of the dangers of entirely automated systems, a visit to an orphanage, the Dancers' sending two message "Watch the many stars" and "Watch the different stars," a hot-head who's pleased as punch that he saw something was an attempt to provoke him, a discussion about Geary's grand-nephew, and much more.