Some editing is possible using NRPNs over MIDI. I assigned some parameters on my Novation Remote 25 controller and can tweak cut off, res and adsr. Some sounds respond better than others but it works well on many. Some monster sounds in there. Great module
I also own a Roland M-VS1 Vintage Synth module. Great sounds (though not editable). That other module ya got there, the M-DC1, never seen one of those before... will have to look into that. BTW, nice demo of the M-VS1 presets! :)
I think these are based on the Roland JV1080 cards? What is the polyphony on these modules? (I just checked the online manual, it has 28 note polyphony).