Prepping for Nano

I'm preparing for my sixth NaNowWriMo (National Novel Writing Month) this November and I have to say that I've seen a decided pattern regarding the complexity of my characters. Looking over the past few tries, the complexity of both the characters and the story itself has not necessarily evolved. It has less to do with which year I wrote it in, one would expect the more I do it the better I get at it. Instead, it has far more to do with how much I edit the novel. For example, my last nano had extremely shallow characters, at least as shallow as the characters in my second nano. But I'm on my third (maybe fourth) edit of my second nanowrimo effort and the characters are becoming far more complex . . . so complex that I actually think it might be too much for the reader to take in all at once. I think I've added too many threads to the tapestry. It's going to make my next NaNoWriMo interesting. I can disregard trying to be complex and just focus on the broad strokes of the story. More on the story I plan on writing later.