I haven't read the book, so my experience is probably different. Still, I agree with your points - - I kind of cringed during the three card Monte stuff, for example, and thought the cast was uniformly great.

I think I had a bit of a hard time with Adam himself. I could see the shape of his arc and all, but it felt like both his heel turn and face turn were...rushed, maybe?...while watching. I think maybe the focus on Aziraphale and Crowley makes the "You're not good, you're not evil, you're human" material a little flat. Similarly it felt like they needed more on how large Adam's human father looms in his consciousness to earn the "You're not my dad, Smaug!" moment. I mean, I get it though, and it wasn't executed badly, it just felt like it needed a bit more breathing room or something. (On the other hand, Dog rejecting Adam when he goes mad with power had full impact for me. Dog person I guess.)