Why don't you do a comic that led to Sunset Shimmer going down the path she did in Equestria Girls and afterwords, similar to the one with Luna and Celestia? Start with a traumatic childhood experience (abusive parents, dead parents killed in an accident or murdered, bullies, etc.) and end with a confession to the humanized Mane Five for her reasons. Will they understand?
Hey, you did a good job here! But... do you know a thing? The tail really looks like the way Pony-Berserker draws it in his comics, therefore it's not very true to the TV show - but still very good since I like this design too, of course. Have you always drawn it this way?