Depends on what you mean by religious lyrics. If you mean something with a clear religious message like Spirit Carries On then yea, those tend to be cheesy. Paradise Lost by Symphony X is mostly about the story of Adam and Eve, and I thought it was well executed. Given the Symphony X-esque titles on Illumination Theory, I hope that's the route they take. With maybe a neo classical edge to the music. That's a style that DT hasn't really explored yet.