I have two ideas:
1) What about three control, two-stomp BJF Octave Pedal?
The controls would be level, fuzz, and spit (octave). Level is volume. fuzz would control the amount and perhaps the character of the fuzz. Spit would control the amount of octave effect blended with the fuzz.
I think this would allow for a wide spectrum of octave-fuzz tones and hopefully some more usuable vs situational ones. Every octave pedal I've tried takes over the sound so dramatically...even if you love it, you can't use it that much.
The first stomp button would turn on the fuzz and the second stomp would turn on the octave.
Not sure if this is even possible but that would be cool if it was!
2) What about a BJF fuzz wah? I would love to hear what BJ could do to make a wah interact more effectively with a fuzz. If you could switch it from normal wah to fuzz wah, that would be killer.