I am pretty sure the plan is to write a spinoff series about all the things that Kuzuhana is up to when the events of the main series are happening. I can only imagine the interesting life she must be leading elsewhere to allow all these girls to move in on her crush.
I think Usagi is a good addition to the stuco fray. Also, this whole setup is kind of weird isn't it? Saotome is incentivized not to even try at all. The easiest way for him to not get the majority vote is to simply not campaign. Also also, if the girls really wanted to beat Saotome, why are so many running? You all know how first past the post voting works, right? You are splitting the non-Saotome vote.
Yeah - I immediately smiled when I saw Usagi. I'd like to see some focus on her and Takae - I think they'd have an interesting relationship, since they're similar in some ways and polar opposite in others.
And hopefully, broadly, this whole situation will lead to Saotone finally working up the determination to stand up for himself. I'm not holding my breath though...