the author doesn't talk about how weird it is for a sword to have a human doppelganger, or at least have Fran react to it in any way; unless it was so underdeveloped that I skimmed over it. The first mention of Shishou using it is done off-screen in secret, but more as a surprise for Fran than something he wanted to actually hide.
the superhuman physical ability she initially displays within Nutella that is completely forgotten.
Kato talks down Lily and Rose. It's like reading a loop; the author goes back and forth with bringing the girl, talking about the responsibility, saying they can't trust the girl, etc. Etc. Can't progress the plot at all, especially when you consider how much sweet time they're taking blithering on and on.