My experience so far in building a live techno setup is that without proper modulation (particularly modulation of the modulation) it's proving to be super hard to keep the music from getting stale. I feel like I don't have enough hands to twiddle knobs quickly enough to keep things sufficiently interesting to play a 30-60 minute set, or to transition from one musical space to another sufficiently different space.
I think it's absolutely true that with practice this will get easier for myself, but I'm definitely looking into how to jam more modulation into my own case (which is requiring sacrifices; smaller drum setup, fewer voices, etc). As I look over this proposed case I can't help but feel it would be mighty difficult to keep the music interesting without more (playable) modulation.
I really like Acid Rain Technology's Maestro, but honestly others here will have better suggestions for playable modulation that can itself be modulated.