When will Jessie wake up and realize that Rick did her a favor?
Rick did exactly what she needed him to do. And she got what she wanted out of Rick. Away from her abusive husband, which she couldn't do on her own.
She clearly never wanted more from him then to use him to take care of the problem that she couldn't/wouldn't take care of herself.
The son being upset that his dad is dead isn't really a stretch. I mean anyone whose ever met people who've been beaten by their dads will know that, for whatever reason, the kids still say "Well it's my dad". So it's not in the least bit shocking that the son is pissed off that Rick killed his father.
The son and the priest could be possibilities for ruining the plan but I'm pretty sure its going to be The Wolves. I believe it's very likely the start of the No Way Out storyline. Those people have a plan, and a way, that they deal with the zombies and they are likely doing this so they can get into the community and get all the stuff they have.
I'm thinking more and more the balance between Rick not taking any chances and taking no crap and the more happy, content, Rick is more about keeping him from going too far toward the kill the threat immediately Rick because of the potential arrival of Negan by seasons end.
You can't put Rick too far toward the "kill anyone who gets in the way" persona because then it's going to be a hard sell as to why he doesn't immediately go out and kill Negan once he arrives.
I LOVED the black and white for the flashback scenes. It gave a small look like the comic that way and I loved that. I really enjoyed the episode. I can't wait for this weekends.