-I think the futility of your actions is part of what made Classic Bachelor route work; Willow always will die, Eva always dies, etc, so being able to save basically everyone takes away from the story

-Changeling route in Classic required at least one playthrough of the game as Bachelor/Haruspex, but both routes were helpful for the knowledge. Hypothetical P4 wouldn't have those scenarios, so time travel would help with the knowledge gap esp for new players

-More possible sister explanations. Does she really have a sister? Is her sister a steppe creature? Does she have some kind of personality disorder? Or timelines merging. Who can say