I don't think that Stoic physics can really serve as a fundamental problem for adopting Stoic ethics to daily life. Case in point - the Neostoicism movement of the 16th century combining Stoic ethics with Christian theology. I think the main kernel of what's attractive in Stoicism is quite easily compatible with different theologies (or none).

Sure, some core axioms traditionally did follow from their physics, but I've found that it's reasonably easy to build a different foundation for those axioms.