Hell yea! I was just about to say "I want another Kanashimi!" or something slowish and uplifting, like Nanimo Iwazu ni, EGAO, Aruiteru, etc. I like optimistic Musumes or badass Musumes!
And I am fine with Koharu as a Rika-ish lead, meaning in the center and maybe a monologue (we haven't had a monologue in a while! how about one?) as long as she doesn't sing that much. Same with Sayu.
Or a JunJun/LinLin monologue would be nice. Maybe in Mandarin?
More singing from JJ/LL, Eri, and Reina! Takahashi and Risa are both strong singers too.
I want less singing from Aika though.