Could be wrong, but one thing everyone that's noticed the reset has had in common is that they care about Sensei's mental health. Ayane tested him to find out what he remembers, Maya is Maya, Makoto is trying to be there for him through Ami, etc.
Tsuneyo has been dealing with Sensei blacking out on Molly, and trying to understand him. Yumi is Yumi, but she worries about his blackouts to a degree.
This does make me want to see Sensei at least try to get Niki and Noriko sentient. Maybe even Touka since she seems to care a bit. Not sure if he's actually tried yet, albeit I could just be forgetting.
In retrospect, I think he actually mentioned the loops to Niki once and instead of changing the subject, she just thought he was on drugs.. which might mean she can be sentient if he pushed harder. I think similar also happened to Noriko, but she didn't understand it and he just changed the subject instead of doubling down. Usually people either ignore or change the subject, but not the Nakayama's from what I recall.