This.
I've always been more attracted to micro-managing a small group with few idols than owning a gigantic company with multiple groups and dozens of employees. I don't really know how viable it is to have a smaller group in the game right now instead of investing in tons of idols and sister groups, but it'd be great if small groups being successful was a thing in Idol Manager. Getting to know your idols and staffers, and bond with them deeply could be just as, if not more rewarding then running a talent agency that's more focused on making money than making human connections. This is what I'm partially trying to remedy with my upcoming mod, with which I intend to add lots of events and dialogues that'll go further into detail about the day-to-day of an idol group, and even the daily shenanigans of a regular person, outside of the wide scope of the show business.
Suggestions and feedback can always help the devs assess what the players want out of the game, but it's important to remember that, in the end, Idol Manager is still an indie game developed by basically two people with a limited amount of resources. Not only that, but the game's already reaching the end of its development cycle, and introducing new features and gameplay systems would be practically undoable at this point. Not to mention the fact that we all have different ideas and wishes for the final product, which may or may not go hand in hand with how the devs envisioned their game to begin with. I, too, would love to see more customization options, more in-depth details for each and every idol, albums, different formation options, so on and so forth. But, like I said, limited time, limited resources, limited personnel. The game would probably never reach the storefronts if the devs were to add every single feature suggested by the community to the game, and that goes for everything in life, I guess. More often than not, less is more, and if sadam and Kuiper won't add more outfits and male idols and albums to the game, either because they can't or because they don't feel like it'd be the right move, then I guess we just respect their decision, as frustrating as they might be to some at times, and either accept it and move on, or work on those features ourselves so they can be implemented into the game via modding (which is quite possible to be pulled off when it comes to male idols, for example).