I think it´s time for an update to the harem list. In my opinion all girls should be in the right order of their releasedate. Not only for clearer overview, but the new 4th & 5th stars would be much more easy to obtain. Now it´s really hard, because some players (veterans) got loads of other girls between princess agate & abrael for example. So abrael costs way to much cash.
Also they should be sorted by their category (story-girls, boss-girls, event-girls), because it looks like all the story-girls are the first ones who get the starupgrades. The next logical step would be to upgrade all the boss-girls.
So the girls should be sorted like this: Bunny, Juliette, Red Battler, Ankyo, Princess Agate, ... , Kalissa (next the boss-girls), Arcana, Kimie, Sheheramazond, Solveig, ... , Zoe (next the event girls), Halloween Juliette, ...
It wouldnt be that hard to implement this and it makes the affection upgades much more easy for the players.

Sorry btw if my english is hard to read ... I hope it´s clear what I mean.