The Stacey Abrams agenda! Alright as much as she is on the right side of politics (aka the good guys in the real world), not quite sure why she's featured - Unless the message is a sublumial Stacey Abrams for president?
Anyway, I paid no attention to that sort of thing or the woe is me stories of certain characters. The 10c were pretty epic the mission was pretty visually satisfying and the ending pretty acceptable although from a scientific point of view I think they missed a few marks.
1: The 10c are clearly way beyond Type-2 on the Kardashev scale. In this universe the Federation and mankind is closer to Type 2, whilst the 10c must be at least a Type 3 civilisation. They can clearly harness the power of an entire galaxy and then some.
2: As a result, any such species would be on a level of intelligence for it to simply be impossible to forget that sentient beings might live in pockets of space they are mining. It simply would not happen as it defies all logic, and at that kind of level, logic and fundamental laws of the current universe dictate everything that is, was and will be. Plus, the Federation ships all leave behind warp core trails which would easily be detected by the 10c.
3: I find it hard to believe that the 10c were unable to catch Book's ship, they can build a machine that mines an entire section of a galaxy in an instant, yet can't catch a tiny primitive ship?!
Still, entertaining and visually quite stunning and in some areas quite moving as a finale.