I think it is a shame she was created for Equestria Girls. I myself do not view Equestria Girls as canon. But if Sunset Shimmer were a pony in the FiM show then there could be a really good storyline there I'm sure. As far as Equestria Girls goes, the movie was good, given with what the writers were given to work with. I truly think that Hasbro just gave the writers the designs for the dolls and told them to make a movie out of it. I view Equestria Girls as a guilty non-canon pleasure, such as reading good quality fanfiction that you know would never happen in the real MLP:FiM universe. It's supposed to be My Little PONY not My Little Pony-Based Fashion Doll. But yes I do agree Sunset Shimmer needs more love and it would be great if she were placed in the 'real' show.