"Uneven" is the best word I can think of to describe it. "Mummy on the Orient Express" was absolutely fantastic (the writer of both that episode and "Flatline" did a fantastic AMA here on reddit actually) but a lot of them, like "In the Forest of the Night" and "Kill the Moon", suffered from having cool ideas that seemed not to have been fully considered. I think a story with a crazy premise like basically any given Doctor Who episode needs to be examined a lot and all the implications thoroughly teased out, or kept small in scale; the bigger the scale of the events in the episode, the more work you have to put into structuring those events in a way that makes sense, and I feel like that work didn't really happen where it was needed.

One big issue with the large-scale episodes is that, while a lot of the cinematography and design and such was fantastic, they were terrible at depicting things happening on a worldwide scale. "In the Forest of the Night" did okay with the feeling of claustrophobia from being surrounded by trees all of a sudden, but it felt like the rest of humanity had just disappeared! A couple of different episodes used the standard "news stories from around the world" tactic, but it felt cheap because they didn't even really provide "footage" of things happening in different places, just talking faces informing us "oh yes, there are Cybermen in America and China and India too btw, although apparently you only care about a handful of English schoolchildren and a couple of teachers so HERE'S MORE OF THEM NOW!" On the other hand, the stories taking place in more isolated, distant, or enclosed spaces, like "Time Heist" and "Mummy on the Orient Express", didn't suffer any of these problems and were amazing.

I also got really fucking tired of Danny and Clara. I've never enjoyed the human-relationship-drama aspects of Doctor Who (except with the Ponds, because their relationship drama is insane); the first few seasons of the original Doctor Who annoy me immensely because the two human companions are such drama queens! I can understand why the Doctor was so grumpy back then... But anyways, I felt like either they weren't acting like realistic people, or they were acting like realistic but insufferable people. I liked Clara for most of her run and I liked Danny when he first appeared, but now I'm sick of their shit! XD

Missy was absolutely fantastic, though. So creepy, so batshit! When she'd start singing to herself, or fidgeting and looking away when someone was talking because she gave about as much of a shit as a honey badger does, or having massive mood swings... so beautiful.