1. Add an in game alchemy book to keep track of potion recipes and/or a method to bulk craft them so you don't need to reselect the same flowers over and over again to make multiple potions
2. Add a method to filter through your servants and prisoners. Things like body types, traits, etc.
3. Possibly enterable rooms other than just the throne room. Such as the bathhouse or completely new ones like a BDSM room or barracks room to house the servants.
4. Ranks for servants so you can give your favorites special treatment.