Culber's newfound spirituality arc felt kinda shoehorned in as an odd piece of character development in a show that's about to end. I actually initially really enjoyed that he felt weird about hosting a Trill spirit (Trek has a habit of stuff getting right back to normal after a traumatic experience) but it's dragged on without a clear direction as to what it means. I have to assume it will become relevant to the main plot at some point. Discovery surely wouldn't leave weird thread dangling, right? Right?
The whole idea of a humanoid habitat built around a semi-functioning weather control network was cool. Though I would have loved to have seen the dead civilization around the tower they eventually go to!