I'm just gonna copy-paste the thoughts I livetweeted as I was watching, in a more cohesive order. It's an... okay story, but it's mostly just a remix of elements done before without adding anything new to the table. Even the Dalek-v-Dalek fight was brief and disappointing.
You know, the fact that for the first time ever, the Doctor is in a prison that they can't escape just piles on to the criticism that Whittaker's Doctor is the most ineffectual incarnation and makes me wonder if they ever would have written a male Doctor in this situation. Also what was the point of putting the Doctor in prison when she's just going to get broken out right away? The breakout SHOULD have been the story, not a detour before things can get going.
Props where they're due, the Dalek assembly scene gave me a proper "oh ****" moment. Buuut... Dalek body-snatching is stupid. Why/HOW does ultraviolet light help Daleks TELEPORT???
Ryan and Graham's final scene be like
This show really, really needs some fresh blood working on it.