The prologue looks much better. I don't have anything to add except "good job."

If you're trying to maximize readers, I suspect that posting in chunks on a regular update schedule is probably the best way to do it, as each update is a chance for new readers to find the story. (That's based on my intuition, not data; PhilGoetz has actually spent a little time analyzing readership data and might be able to tell you more.) You can remove the gdoc if you're worried people will track it down, or leave it up for the small minority of people who care enough to search for it.