You're a pastry chef, and a client has come in requesting an Opera Cake, but they are requesting different flavors and have asked you to get creative. They want you to keep the traditional structure of the Opera Cake, including layers of different ingredients, but they want you to swap out at least $2$ elements. For instance, you could change the buttercream, the flavor of the ganache, the flavor of the simple syrup, etc.$*$ What $2$ elements would you remove, and what would you introduce into your new, creative Opera Cake?$*$ What would these new elements do to your cake's flavor profile, mouthfeel, and presentation?