User blog comment:Mgdodl/"The Gamblers" Discussion/@comment-31057575-20200131110140/@comment-3169324-20200131125601

Who says God can't become stronger? Maybe he chooses not to because he already believes himself to be invincible (or close to it).

Regarding Billie's interference, God violated the Natural Order when he cracked open Hell. Death, above all else, maintains the Natural Order, while God thinks himself above it. Also, Billie knows full well that killing God would end reality, so I'm guessing she has a plan of some sort to avoid that. I also hope they don't go for the "Jack replaces God", angle because that's stupid, but she probably has something in mind. She's Death, she's got a bird's eye view, remember?