[Oberon]

Yeah...it started mediocre, got quite good and then ended poorly.

 

At least Moffat has finally explained the Deus Ex that made Missy survive (but still has yet to explain how she got back from Gallifrey) and, of course she and Clara survived, that really wasn't a shock at all.
That being said, there was some good one liners from Missy, in particular when she shoved Clara down the hole into the sewers. That being said, I still feel that she's being played too much as a clown, too much like Didi from Dexters Lab, bouncing Dalek laser beams off her arse while taunting Clara in the Dalek.
The real highlight of the episode though was the scenes between the Doctor and Davros, I think Capaldi is still trying to find his ground as the Doctor, but Julian Bleach is fantastic as Davros and it was such a shame that the whole scene was ruined by Davros's inevitable attack on the Doctor at the end of it. I mean, I know it's in character, but it was predictable. Throughout the whole scene you're just waiting for him to do something evil and so it comes as no surprise when he does, it undermines the entire scene...would have had more impact had Colony Sarff done the betraying instead, with Davros angry that he did it and so he exterminates Sarff and attempts to apologise to the Doctor who, of course, believes that this was Davros's plan all along.
Still, this is Moffat, I guess I shouldn't expect miracles.
So, naturally...like in many recent Doctor Who episodes, you get so far into the episode and it's time to quickly end it, I can almost invision the Doctor pulling a Jammy Dodger out of his pocket and going "Right, that's enough exposition for this episode, we've run out of time...time to wrap things up!" And then everything explodes and he runs into the sunset with Clara and the TARDIS.
I also find the whole 'Hybrid' thing another attempt by Moffat to shoe-horn something into the series that wasn't already there. You'd have thought something as big as a Timelord/Dalek Hybrid would have been mentioned by the Timelords or Daleks before now, especially if it was the reason he fled Gallifrey all those years ago, before the beginning of the original series of Doctor Who. That being said, Clara inside a Dalek did hark back to Asylum of the Daleks and I wouldn't be at all surprised if Moffat does try to bring it full circle at some point, probably around when Clara leaves by perhaps implanting her consciousness into a Dalek or something, which then in turn winds up on the asylum. It's a messy thing because Moffat has no real idea of continuity, but it strikes me as something he might do. He does try to do the whole overarching plotline thing but he's not as good at it as Davies was, although admittedly Davies used to be rather clumsy with it, hitting us over the head with the 'word' de jure every episode (Bad Wolf, Torchwood, etc).
So, it had potential this episode, and there were definitely some good parts, but again it was let down by the traditional rushed ending and bad writing.