My thing is, if the dark world truly is imaginary, and wasn't real in any way shape or form, and Susie truly was laying on the cold floor in a random closet instead of a bed in the dark world, then that means "The Roaring" is a meaningless threat that will have no effect at all
P3P asks you a fascinating question at the beginning.
Would you like to play Persona 3 but worse in every conceivable way
Or
Persona 3 but worse in every conceivable way but with new social links.
Interesting decision