There is also the possibility that there may be a relaunch of X-Men in January with Hickman leaving, and Ewing hinting that he is playing a big role in shaping the future of those titles the reshuffling behind the scenes may have caused a delay in this books.
Hopefully, Ewing doesn't leave Guardians.
Who know may be Hickman's next big project with marvel is its Cosmic line, it might offer him some the freedom he likes.