Why not just add the stats to the girls pages in the notebook. That would be a natural place to look for them IMHO.
I doubt 2 people will ever agree on the right balance between too easy and too hard.
But repeating the same task 20 tries before I see progress is too tediously for me. It would be nice to be able to corrupt all the girls by getting caught spying on them in toilets, showers, naked gym lessons etc. Maybe add a swimming pool, where MC could spy on the girls skinny dipping at night or add spying on the girls serving the customers at the club and getting caught by another girl. The private tutoring could also be a path to corruption. Those scenes should off course end with sex. Bottom line. To corrupt a girl, I prefer more ways with few repeats than few ways with many repeats, and I hope you will make the semi sex scene where Olivia is service MC in the massage salon apear more frequent in the near future. It's a pitty we only get to see it a few times before it disappears for good and all we get is olivia complaning about working in the massage salon when we check on her. The same goes for spying on Hannah etc.
I really like that this game is not just another in a million. And please. Never finish it. Just keep adding content. There is room for A LOT more in the club.