All right, I'm glad to see that your runoff is in range. That's a relief.

You should be running a flower nutrient with virtually no nitrogen in it from here on out.
Don't forget to mix extra perlite in your fresh soil. A large part of the problems caused by a plant being root-bound is that the roots can't BREATHE. This is especially important when it is chilly in your grow area.

I guess this is simply an issue of too many cooks spoiling the soup.