Metapotence is apparently when the user's power is far beyond any logic or reasoning. Shouldn't that mean that Metapotence is more of an absolute version of Logic Defiance rather than Logic Manipulation?
I would say they don't just defy logic but they can create anything (Omnificence) and no matter what it creates, be it realities, powers or almighty objects, you shouldn't really question how they did it. Surely, they can defy all rules of logic, yet they can also bend them and make new rationality.