Should be playable with previous saves, I should think. Haven’t done a complete overhaul of the other areas.
With that being said, I’m mostly sure that you can get almost everybody’s backstory the legit ways? If you can’t, let me know, I’ll add in a way to make it so you can see them.
Also, beware of repeat viewings, things probably won’t work a second time; and I’m already aware that Sydney has Mom’s sex scenes attributed to her, that’s not supposed to be there.
To get Meridiana’s scenes to run, use the sparkly event in the Prison map once it’s unlocked to get all 13 of the required variable, she should unlock then.