My only issue is that Akuta showed up in that one chapter and was like "Time to save the day" and then never shows up again. Bruh.
No idea who their father is (cant possibly be kii or his son and why did he have those powers and who took them away?).
You can tell that the ending was kinda rushed but at least it was somewhat satisfying.
Also Rina just remained as Shizukume's sister doppelganger because this is technically the aftermath of the original destroyed world after Ichi fixed it.