Okay, so another reset, and a modified plot and a new voice and the words suddenly just started flowing. I know it's generally considered bad to hit the big reset button during NaNo, but I'd completely lost my footing, and couldn't get motivated to write.
I started today, in a free moment at work, and the words just poured forth. A new voice for my MC meant a whole new way of talking about the world, and a whole new direction. Everything seemed to click this time around, and I'm actually excited to continue working. Which is something I never managed to do in the last version of this story.
In the end, I suppose only time will tell if I made the right decision.