Coherence
i love the amount of depth that went into this its insane and I'm surprised i was able to stay focused and not stray off path with what was going on
okay so i do agree with the theory that the Bathroom!emily is different from the Happy!emily, BUT i don't think she died during the final scene (when hit with the toilet lid). I think she, knowing she would get continually injured or killed by Original!emily if she stayed, left, took the PHONE from Happy!emily, ran away and then still tried to ruin Original!emily's life (they both are reality shoppers and jealous). It confirms that she (Emily in general) can stay both being unstable (away from everyone, but also ruining Original!emily's life) AND successful (Happy!emily's universe being the one where she is the leader of her show) in the same reality, and can be a double entendre for the Schrodingers cat. She is both unsuccessful and successful, it just takes releasing the box (calling Kevin and revealing the truth) to collapse reality. SO! when kevin receives the call, what probably happened is that Time folded in on itself and everyone died and flattened.