I'm thinking the "cheats" are all the DLC potions. They're the source of almost all of her XP, thanks to quests giving only reputation and Susan being unwilling to do the standard video game slaughter, and the "evil points" from giving cosmetic potions to NPCs were the source of her horns and tail. Take away the potions, and she's back to having just completed the end-of-tutorial levelup. She is an exceptionally famous and well equipped end-of-tutorial character, though.