Has anyone asked this natural theology question?

Reformed folk are again debating natural law/natural theology (this happens every five years).   While I don’t defend theonomy any more, it’s still hard for me to get excited about “natural law.”   Notwithstanding, here is something I just thought about:  does natural law/natural theology presuppose a classical metaphysics and definition of nature?  Must a Christian be bound by that, including its limitations?