Nah, Sunset was blasted by the Deux Ex Machinima of the series, Kuvira, on the other hand, refused to surrender and when the Avatar personally showed her immense power, she realized that she was not match for what is the link between the spirit and human world all wrapped in a single person. Kuvira was trying to become god by controlling the spirits, and she was shown to be in a futile pursuit.
The finale in Equestria Girls is pretty cardboard in comparison. Sunset had no motivation to turn other than she had been defeated. There was no reason for her to still resent Twilight and her gang, yet, she turned because movie.