Hello, I've own the Moog Multi-pedal and been using it with Eventide stuff since forever. not sure, what type of advice do you need? both the Eventide and the MP-201 are so flexible you can accomplish just about anything in terms of Midi control. I do think the MP-201 is suited best for analog gear with CV and Synths with MIDI-note capability.

Eventide makes the Expressionator obsolete. You can accomplish the same basic thing with an expression pedal and a couple of MIDI cables and send expression over MIDI. Don't waste your money on that is my advice.