So, I've played Idol Manager for 10 months now and I feel the lack of some things:
1. Photobooks: I guess this sounds a little weird or non-important but I'd love the option to release photobooks for my most popular idols or even for the entire group! I imagine it as a system where you could choose the theme (a sexy, fashion/pretty, cute or a cool PB) and the quality of the construction, the quality of the photographer and all that combined with fans would make the sales number. Would be nice to have a re-print situation, just like Shiraishi Mai's PB got reprinted NUMEROUS times XDDDD
2. Separate charts: I guess would be really cool to see a Digital Chart, where the numbers and the position would be based more on what's trending right now and on younger fans, but also a Physical Chart, this one being more based on how many fans you have/how many copies they were willing to buy, and, of course, a single having two types of sales, the physical and the digital.
3. Sales not being restricted only to the time of the release: well, the ~title~ kind of explains it all, I really think sales should keep going through the years/months, maybe some singles could re-enter the charts based on what's trending at the moment.
4. More depth on single making: the system right now is good but it could use some detailing, what I have in mind is music video costs and options, the option to create more than one type/version of the same single, the possibility to create b-sides as well as the idols that will be singing those songs, maybe the possibility to choose the materials the single will be made of (for example: cheap plastic would make fans unhappy, good plastic would make fans happy/buy more copies), that cover thing back maybe with options of customization, the possibility of having a double center situation...
5. Generations and Auditions: would be nice to see a generations distinction between the idols, for an example: girls that got in the group on the same year would belong to the same generation (2018 - 1st gen, 2019 - 2nd gen...) and this would be shown on her "card/profile". About auditions. I really think auditions should be larger, or at least have the option to make them bigger, something like 15 or 20 girls (of course, costing more money).
6. Music Shows: being invited to perform at music shows like Music Station or Kouhaku Uta Gassen would be really fun, choosing the idols, the setlist in case it's a year-end thing, etc...
7. Financial Reports: would be really cool to have graphics and comparisons available to see the growth or the fall of the company, maybe a monthly or yearly report!
8. Customization: well, that would need a lot more work from the artist that makes the illustrations for the game but ANYWAAAYS, would be really cool to get to set a particular uniform that all of the company's or group's idols would wear.
9. Being able to have separate groups under the same company: some sort of sister groups but not really, I don't know if that makes any sense at all XD, something like having the option to invest money on a completely new project with completely new idols, but them having a push because of the company's and the previous groups' fame. In addition to that some sort of paying for marketing so the new group can start with fans already would be cool.
10. Disbandment: I'll be honest, sometimes I just get tired of my groups and want to end them and start something fresh, but with the company's money to invest.
11. Bigger elections: having up to 15 (a full single team) elected idols would be cool, and possibly some sort of Undergirls, Next girls... just like on AKB.
12. Sub-units and solo releases: I've seen many people suggest it but I'll do it anyways, having sub-units and solo projects (like Tomomi Itano's "Dear J", or no3b, not yet, French Kiss [all from AKB]) while they're still inside the group would be amazing! (If someone wants to do it ~unofficially~ you can create a sister group called "solo" or something like that and place only one idol there XD).
13. Possibility of buying lyrics, instrumentals, etc: sometimes my producer is just way too busy with special events so having the option of buying lyrics would be really helpful.
14. More cooldown time between singles: I guess 1 single per month is a little bit too much, at least in real life fans would be pissed/overwhelmed, so bigger cooldown would be great, specially if the system of the sales going throughout the year is implemented!
15. "Random" elections: It would be cool to see something like the AKB48's Janken Tournment, an event randomly deciding the girls that will be participating on the next single, maybe randomly deciding who's the next solo project, or the next unit project, photobook etc...
16. Full albums: well, simply the option of releasing full albums XD but with much longer cooldown than a single would have
Guess that was it, I didn't expect to write this much but I hope this is helpful to improve the game!