I've added the Intellijel Uscale to controle the VCO and a multiplier for good measure. The delay isn't strictly necessary because of the mixer's onboard effects, so that would give me another 4HP for something I might have overlooked.
I don't need MIDI because I want to move away from laptops/software. The idea is to separate every audiostream from eachother as much as possible and patch those into an analogue 16-channel mixer and have a palet of sound available to me to mix into something coherent.
Mixing, attenuation and effects would all be done on the mixer, which means that I need to keep the signal flow as tight as possible: the smallest package that will give me the most flexibility.
It's but a concept though. Can you think of any reason this is a silly idea?