J=J always has about 50% of members performing well:
5-nin: KNTM, Karin, Sayubee
7-nin (after 2nd gen joined): KNTM, Karin, Sayubee, Ruru
9-nin (after 3rd gen joined): KNTM, Karin, Sayubee, Manakan, Ruru
10-nin (after Reirei and 4th gen joined): KNTM, Manakan, Ruru, Riai, Reirei, Kisaki
Now: Ruru, Riai, Reirei, Kisaki
J=J lost a lot of prominent members, but there are prominent members joining as well. The problem is that there was a mass graduation of prominent members, and even new prominent members cannot catch-up with the recovery of J=J fanbase.
Furthermore, the group has to evolve. They cannot be stuck in the pass. Even though Eeny Meeny is not my cup of tea, promoting both Ichika and Risachi is a good tactic, because I don't want to see them become Haga Akane 2.0
The group right now is fine, in my opinion. However, there must be a serious discussion about the future trend of the group, and there must be more investments.