Jo's beauty isnt everyone cup of tea? And variety girls isnt fans main preference too. I mean, look how much management invest to Ikoma and Kazumin. Compare to Misa and MaiMai, back then, they recieved way more push. And we know Ikoma never been fans favorite and Kaz having mild popularity only. If we add Manatsu to same class, may be she wont as popular as she is now if she not a fisher.