I really liked they didn't try to give the villain more motivation, he's just a bigoted monster trying to maintain what he sees as lost power and privilege, just like all bigots in the past and in the present.
It's weird to me that people are saying the one-note racist killer didn't have enough motivation, given that the primary villains in this franchise for the past 55 years have been
one-note racist killers.
The Doctor lending a cell phone to Elvis and revealing that she's Bansky were great gags.
I don't think she really is Banksy, she was just... what do the British say... winding Graham up?
The way she faced down this rogue time-travelling racist/greaser was a sight to behold.
She's unexpectedly aggressive at times. Compared to a lot of the Doctor's previous selves, she's a lot more in-your-face and contemptuous toward the baddies, like when she yelled "Stop right there!" when she first saw Tzim-sha, as if she were the police.
On the (admittedly limited) evidence we've seen, the Weeping Angels zap you less than a century into the past whereas Ryan by his own admission, dialled the weapon back as far as it would go. Zapping someone back to 1895 isn't a death sentence, you could still live a long life, zapping someone back to the Jurassic era on the other hand, would probably be a near immediate death sentence.
Ah, but remember -- Krasko had an implant that prevented him from taking any direct action that would hurt or kill another person. But he did try to zap the Doctor with the displacement device. So if he was capable of using that gun on a person, that probably means the device was intrinsically nonlethal. It probably has some sort of safety feature that ensures people end up in survivable locations. That'd have to be pretty much built into any time-travel device, given that planets move through space so you'd have to track them as they moved.
Also, it's just a matter of story logic. If a story gets rid of a villain in a way that doesn't explicitly kill them, it's safe to assume they're still alive and able to come back for a sequel.
I did like Yas' confusion as to where to sit on the bus, it highlighted the preposterousness of the situation in Montgomery even more.
I have a hard time believing that she would've been allowed to sit up front. Yaz's skin is darker than a lot of African-Americans' skin (including the actress playing Rosa Parks). So the people in Montgomery would've seen her as "colored." They did kick her out of the restaurant, so it seems odd that she didn't have trouble on the bus.
It did seem a little reckless that the Doctor would let Ryan run all over Montgomery on his own given his unfamiliarity with the city, the time period, and his ethnicity.
But that's kind of the point, isn't it? She doesn't have the right to forbid Ryan from making his own choices. She could warn him of the dangers, and she did, but ultimately the decision was his.