I'm not sure if these items will be in the final game or not, since this is in Beta stage, but here are some ideas:
1. Have the genre of music that's playing during the concert performances match the genre of the single that is released. Right now, there is just one generic song that's played.
2. Have the idols that are in the cutaway or extra scenes, match the looks of the idols that you actually have. Again, not just a generic piece of art.
3. There are only two scandals that happen. I am assuming again that this is just because of beta stage.
4. Have the idols in different outfits besides the ones that they start with.
5. Either a cap, or a way to fix mental stamina. (Again, I'm just assuming that it's being addressed in future releases)
6. There's not really any interaction between the producer and the idols / staff.
Thank you