Mixed feelings about the finale 2-parter.
+ Not a world/universe ending finale. Technically the colony ship is kind of a world, but it feels more like a regular save the day adventure (even if we are left not really saving the day).
+ Best version of Moffat's "I waited for X years" trope. Rory's Last Centurion probably paid off more emotionally, but I really appreciated the black whole being the justification for this one.
+ I like the Doctor's angry regeneration, but it's difficult for me to justify why he's so against it
+ Missy's waffling was really believable to me, much moreso than if she had straight up on the Doctor's side. She doesn't know whose side she is on or what she is doing.
+ Missy pretending to be The Doctor for a while was hilarious but...
- indulgent. The episode felt very indulgent from Missy calling the companions exposition and comic relief to The Doctor saying 9-11s regeneration lines.
- Very much an episode you can't think too much about. For example, why did the crew members who went down to reverse the engines start living down there? And are we really to believe none of them understood black holes enough to predict the time dilation?
- Pacing was very messy in the second part.
- Water girl payoff for me was somewhat unearned. I didn't like the premier much as a story, and water girl's magic powers feel very much like deux ex Moffina. But I guess that's a fitting way to close out Moffat's run.
Anyway, overall I liked this series very much tonally and a little less so week-to-week. I was weirdly proud of Moffat being able to "walk it back" in terms of the grandstanding and end-of-the-universe stuff and do some more personal stories. Everything came back to people this time around, whether The Doctor, Bill or Missy, and that was to the better.