Having played a frankly embarrassing amount of this game, I definitely have a few ideas for improvements or changes to be added in the future, they're really just ideas that I thought might be fun though.
-Different sprites and appearances for different age groups. It definitely feels a little weird having a girl who's 28 and has a sprite who looks like she's 11, and it would mean I wouldn't have to check ages for each and every single one of the idols as often as I do now. It would also be nice to have the clothing available change depending on the policy you choose for their clothes (pants if you choose pants, longer skirts, ect)
-In the same vein, some form of awareness for the age of the girls would be nice, as you can have 12 year old girls being suggested for gravure photoshoots, and, in at least one dialog event, you can flirt with them. Having the flirtatious options changed or unavailable would be really nice, since as the game stands I just kind of pick the blandest options to avoid accidentally flirting with any kids. T-T
-Reputation and management styles! A sort of mechanic of reputation where depending on your choices, either you or the company gain certain types of reputations (salacious, rude, exploitative, laid back, supportive, ect) which would give you different buffs and effects! For example, if the company gains a salacious reputation, the idols you get in recruitment will be older and have more points towards the sexy stat, and you may even get less idols in the recruitment process. And then for you personally it could effect how the girls react to you, like if you have a good reputation with them you will gain more influence and friendship faster, and if you have a reputation for hitting on idols you may gain it slower. As for management styles, I thought an added policy option might be nice where you can choose to be stuff like 'hands on' or 'hands off' where you get different buffs and debuffs. (like maybe if you choose to be hands on you get higher quality production but it takes longer regardless of who does it, and it would be the opposite if you were hands off)
-Other than that, I really think flavortext events with different groups having scandals and how we might react or benefit from it, or even the option to poach girls from groups that aren't doing very well (or an option for girls to ask to join your agency outside of recruitment because they decided to leave their group, and what kind of risk you would be taking if you accept them in) This isn't really a huge thing but I feel like it'd make the game feel a lot more alive and less lonely since right now we hardly see anything of any other groups, and it's even less if you don't play story mode.
These are all things that probably won't actually be added until after release if at all, but I still figured I'd suggest it just to put it out there. Other than that I just wanted to say I absolutely adore this game so much and it brings me so much joy, so thank you.