More pedals with crossover control from the clean signal to the wet signal. Maybe something like an octave pedal with a chorus in the second chain, so you can modulate the lower note and provide an octave up, or vice versa. Many interesting things could be done with crossovers and blending, and I'm sure pros would appreciate not having to carry the extra crossover gear and two or three different signal chains, or at least an alternative to that.
