So I was watching a streamer play this game, and they get to the part where Monika deletes Natsuki and Yuri and creates that room in space, however since he change monika.chr name it just skipped monika's explanation of everything she's done [basically skipped half of Act 3].   I just think that players being able to skip that unintentionally may lose some story elements especially the explanation of Monika's motives.  I don't know how you would do it, but maybe somewhere along the lines that Monika made a backup of her chr file when the game first starts.  Then maybe at that part she'll point out to the player her file was missing when she restores her file from the backup, then tells them she can no longer access the backup due to the game's "broken" state and tells the player to not delete her this time.

Update while writing this: The streamer just got to the credits and Monika's art was greyed out!  I guess  this is intentional?  I still think players shouldn't be able to skip that part though.