Here's a thought..you could add another tone knob and instead of it just effecting tone you could wire it through the taps so you have open pickups when it's lower and they close up when you crank the tone up. :) Softer tone=acoustic gentleness, higher tone=humbucking power.

Or you could add a 5-way switch set up so that it adjusted the coils, so like with it towards the bridge pickup you would have the bridge pickup humbucking and the neck open, and vice versa. That way you would only need to flip one switch instead of turning all those knobs to do the same thing.

Just a couple ideas, I'm not sure how either of them would work. I can't say I've ever seen either of those anywhere.