I mixed feelings about your theories. I love them because they're awesome, or have awesome implications- and tend to make a scary amount of sense.
But I if they're true there is a shit load of stuff going on in the Dresden Files that is flying way over my head, which is a little depressing. But then again that's kind of exciting.
Well, I think that it will be like any good mystery. All of the clues are there, we just might not have noticed them, yet, or put them all together. But as the dominoes start falling Jim through Harry will be sure to point them out to us. So when we get to book three of the BAT and we all know exactly where its going we'll be saying my this going to be a beautiful and spectacular very Harry train wreck.
... and loathe as I am to compare Dresden to the other Harry, both authors share a lot workmanship traits. There were tons of underlying themes in that other series that not a lot of people spotted that added to the depth of it all, but you didn't need to catch to enjoy it. And if you'd been paying attention you had a pretty solid idea of how the whole bit was likely to end before it got there, too. In a very broad sense (very broad sense) I expect the DF to be like that; deep rich, and while not exactly predictable, but when you get to the end you'll be pretty sure where the story has to go to get to the finale.
edit: did that make any sense?