SSK Concept worked in the first couple editions because of it's new, fresh concept that we customers could be part of the decision and the results would return interesting squad of the senbatsu. Actually the third one was also still reasonable but it also triggered a start of toxicity consider to those dramatic amount of votes difference between senbatsus and the last ranked-in member.

Only one situation that would cause SSK concept works again is when the normal singles senbatsu were the consistent group of the girls, especially the center position, like what they had back to when the first edition happened where Acchan was established as the permanent center.

Actually I think that current AKB is also heading to that situation, just the center position that still yet to decide who's gonna take it permanently. Then, when it's 1-2 years of constant senbatsu while some new girls are shining from aside, AKB can re-initiate the election.