Hayashi played really well in the past 2 games, as OH vs Serbia and Opp vs Brazil. I would love for her to have more playing time, but I am also unsure on who should she replace. If she's off the bench, she can either replace an OH or Opp, whoever is not playing well in that game. I think I'll just wish they put her in immediately if something is not working, instead of just the last set.
I think Kurogo is still needed over Ishii, but I doubt her position on the right. I'm curious on how she'll fare going back to OH. Nabeya could have been the most universal sub but oh well.