No Aki because Nayuta already has the Gun Devil, his family probably didn't die and he didn't become a devil hunter, or he did but he's not around because no Makima.

Asa was already miserable before the Bucky incident, however, the Bucky incident was seemingly the catalyst for the class prez to kill her. So she's miserable but she isn't dead/semi possessed by Yoru.

Yoru's fate is still a mystery, but no Pochi means her devils still exist or were subdued by other means. So no vendetta against CSM either.

It is pretty awesome Power is back. In a scenario where Denji is at his happiest, how could she not be?!

I wondered if it was possible that Aki is one of the “seniors” Denji referenced on the final page. Yeah maybe a bit of a reach, admittedly.