I don't like this.
Nothing personal, I just don't see why an original character deserves more power than all the princesses combined.
I also don't like how you described her as being beautiful to everyone. What if I'm not into what others are into? Not everyone likes the same qualities of beauty, so that's why she isn't beautiful to everyone.
But what irks me the most is the "so many cutie marks". Unless you have the cutie pox, you only have one cutie mark. That's it. Disagree with me? Find a healthy character from the show who has only one cutie mark.