So, a couple of comments. It was a well-written episode and thoughtful about the ways it tried to at least remember some aspects of canon even as it forgot others. I loved the way Cas had agency and agenda all his own instead of just, you know, playing support staff for the Winchesters. But if Cas didn't play support staff it felt as if Sam did in his place.

Lily Sunder has some regrets. She used to have more, nightmares even, but she's lost some of her soul and as a result, some of her regrets so she doesn't have all of them anymore.