Add a can of white beans in tomato sauce. That'll really bring out the personality, along with some freshly grated ginger and some chopped coriander. Seriously though: I have no idea why you'd want to add more crap to a dish that's already perfect.
Sure, you could replace the guanciale with prosciutto and zucchini, you could add chopped chives, and/or a bit of chili. But that's just a waste of time and effort, really.