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.
Copy the thumb at the bottom where it says "Details". You only have to scroll down a little, then it will show it in black bold, and you copy the words in the white part just to be clear.. Then go to whatever on your profile like the ID part, or favs part, of gallery part, or even donation pool part, you edit at the corner where there is a pencil and you paste it where you want. Then your done.
I've actually seem quite a bit cute and funny art of Sunset! Like what happened after Twilight leaves and the Gals show her friendship. I guess you just haven't found it yet, but the love is definitely out there!