I'm just wondering if a Blend pot with one Master Volume would allow smoother control over blending the two pickups.
I used to be big on the dual volume control thing. Must be as a result of having played Rickenbackers & Jazz Basses.

But anymore, I just don't see it as practical for bass. When I'm playing in the moment, and I have to adjust my volume, the last thing I want to do is have to fiddle with not one, but two volume knobs. It's just too much distraction.
MM