"All those who asks for greater authority certainly does not deserve to have it."
That's a lesson Sunset Shimmer never wanted to learn nor accept. And it was the key point of her downfall, but perhaps all she needed is to learn it somewhere else.
This story features a Sunset Shimmer still blinded by her own ego, still bent on her reckless folly, still angry at Celestia and her teachings. But there might be still hope for her, if not in Equestria then maybe in another world