Here's another argument I'm toying with. The Earth is filled with harmful and lethal flora and fauna. Furthermore, such flora and fauna are often either undetectable, or look harmless upon first inspection. Theism makes this surprising, as the Earth is supposed to be our home, and not a Hunger Games scenario. By contrast, such a human-inhospitable environment is expected on the conjunction of naturalism and evolution. So if theism is true, then there appears to be a root mismatch between goal and outcome. Such an argument is conceptually distinct from arguments from evil; it's a planning or implementation problem at root, and not a moral problem.
In any case, that's the basic idea. Thoughts?