i know that the true beauty of the 301 is merging DSP with the wonderful world of CV - but i think being able to map usb midi to the environment would be amazing. there are plenty of instances where i want to have control over a wet/dry value or levels but don't want to use up valuable (and expensive) rack space as well as the 301 inputs with basic static controls. in terms of UI - i would imagine you could map midi input via the same input selector, but in addition to the INx, Ax, Gx, etc. there would be a MIDI tab, and within that perhaps a "learn" button. when learn is activated the last active CC or note would show up as a selectable option.
then there's the issue of accessing the physical usb port on the 301.. but leaving a 1hp gap for a usb cable is no problem for me.
thoughts?