I did like Sunset in this film more then in the first for sure. Though I’m not sure I entirely buy the uncontrollable demon part. I don’t think that was ever implied that was what happened. It seemed like to me from the first film that’s what Sunset was planning the entire time (Doesn’t help it never really explained how the Element of Magic turned her into some demoness).
I am happy that at least the movie said that Sunset is still trying to redeem herself even after the conflict had ended and her helping defeat the Sirens didn’t just completely change the Students mind on her. As I do think Sunset needs to do more then that to make up for not only the events of Equestria Girls but the implied years of bullying the other students.
However, I’m still far more interested in the introduction of Human Twilight then Sunset’s plight of redeeming herself. Whenever that Spin-off series and/or a 3rd EQG film arrives.