Wow, haven't been there for almost half year.
Great job with this EX, my congratulations. Now, as a strategy, game beats Slave Maker 3.
But! First, it definetely lacks RPG part. I mean, skills, characteristics, deegres of traits and so on. Second, brothel (structure) is still static. What if player could by and unlock upgrades, like alchemy lab, furniture, armory, for example? Third - relationship between girls. Some of them come from similiar anime, so, why they shouldn't be enemies, friends, or one battle team?
Of course, it WILL be hard to code, but interesting to implement and see in game.