Well, one thing's for sure: this guy idols.
There's no way to know if your feedback will end up being featured in the game when it's released or not, but I'm sure the devs will read this and I'm sure it'll be food for their thoughts. There's still at least 3 months of development until Idol Manager starts being sold on Steam and other platforms, so maybe there's still time to add more stuff, other than the rest of the main story and some features like the cafe and the theater.