I agree. Aarii's popularity is at the bottom among J=J's old members (before Ichika, Risa and Kisaki addition). Ruru and Reirei alone cannot recover the loss from old members' graduation. Yume and Riai still have a long way to go, and new members are too new to set up a decent fanbase.
J=J needs some time to recover, and MM will dip in the same way J=J does if there's a mass graduation.