^ The fact that Kawamura had not only the talent but also the enthusiasm to organize all of that demonstrates why she was promoted to sub-leader — and eventually leader — over other, more senior members. I refuse to believe it was simply because she is the second oldest member now; she's only a few months older than Kamikokuryo, and Kamikokuryo is plenty smart enough to do the job if she actually wanted to.
They really do need fresh blood, though. With Takeuchi likely to graduate in the next couple years, Funaki supposed to be gone already, and Oota suspended indefinitely, the group seems weakened.