I have only two reservations on the project. The first is my motivation, and the second is procrastination.
My motivation for the project is questionable. I find myself in discussions with other Christians from time to time, being disagreeable most of the time, and we reach an impasse. In the discussion and after the discussion it's apparent that the impasse is the result of differing foundational axioms. Unfortunately, the discussion of the axioms themselves never takes place and I'm left with a horrible, gnawing hypothetical image of a discussion that could have been. My project to pick the Big Issues and write about them seems like little more than engaging in the hypothetical discussion without the interlocutor.
Procrastination is not what you think, though. It's not that I don't have the interest or the time. Rather, by writing it all down I would probably have created a tenuously justifiable reason not to go and be a Christian. Prayer and Bible study, valuable as they are, are also great things to occupy your time while you procrastinate about being a Christian in the world.
So I don't expect to see a systematic theology move from my mind to print any time soon.