Alright, found the list I wrote for bugs:
- When Sarah gets her package from Billy, you can activate this event twice and reap x2 amount of the items he sent her.
- In Chapter 2's intro, you can open the menu and save your game before the phone stops ringing
- When going to the shooting range where Sarah gets her first kill, I interacted with the sign as something that looked like a soul sickness demon came out of the ground but I went back to the room before and it was gone. I'm unsure if this counted as sequence breaking and didn't retest it when I did Rotten Tree because I used the cheat room.
- Like Jungian Shadow, Underwater Billy's fight can be redone over and over again if you revisit the area.
- The 3-Eyed Jack you get in the area across from Sarah's hotel room changes its sprite if interacted from the sides
As for spoilery questions I'd rather wait to see the story unfold, a lot of the intrigue for me comes from not really knowing where anything is gonna go next.