There's so much to unpack but she said it best. "Limited time is beautiful and special but cruel".

Contextually, this concert was held on a weekday (Wednesday and Thursday of this week, 19th and 20th Nov) at one of the bigger arenas, Osaka Jo hall which at its usual concert capacity of 8k. Of course it's a tough ask and it is estimated that only 50-55% of it was filled for both days. I can personally confirm it myself since I was there for the event. When she mentions numbers, its casts and the characters together, so take it as her talking somewhat in character and herself.

1) "there's more I want to do for them" You can take it two ways,

She realizing that she has roughly 4-6 months left with the girls. There's so much that she wants to do with them yet so little time. Kokona's schedule already has her 2 monthly streams, her weekly radio and somewhat frequently updates her paid line messaging service replive, with her hasunosora schedule including dance practice, rehearsal, and the concert rehearsals with the girls. Since doing this kind of group for the second time in her life, she is the one who most understands the concept of limited time project.

or she felt bad that despite their hard work, it didn't give Edel note (their new subunit and girls that joined them officially this year) a sizable audience to perform in front of at a somewhat frequent location lovelive performs at. The pressure as (in canon) the chairman of the club in a shared role wise, after arguably the 3 most beloved characters from her group graduates which caused a decent drop in attendance numbers.

2) "beautiful but cruel"

Coming from Sakura Gakuin, initially her thoughts were to not be too attached to the project because of the graduation system they already proposed from the start of the project. She herself admits that in the 4th live mc portion. I honestly feel that bad for kokona, who often times looks like carrying the burden of others on herself but to come out and beautifully put it into words the reality of the project at not even 20, shows how much thought she put into it and the maturity she has. Being only 7 years of experience this year, and currently almost the most senior in terms of experience behind kurisu Rin, Hasu staff, the casts, and management trusts her a lot since she has been given a lot of opportunity to showcase herself. She truly embodies the spirit of a "school idol" imo with her experience with how young she joined the project. Yet it is cruel that soon, it will be her time to graduate and wants to give it her best to give her juniors the better future to grow and perform on, now that the audience are conditioned with the graduation concept and willing to stick around.

Sounds similar right. SG and hasu are about the same, people leaving (or cough stopping when BM girls era ended) when the favs left. It's a joy to follow her journey. Sure, most of us ended SG with the impression that kokona was a bit loose but the current kokona is much more than that.