"There's gotta be a simple workaround, that could change from dual mono to stereo via midi without touching the EDP."
there is...and it all has to do with the foot controller. set each to a different channel, say 1 and 2. program your controller to send identical messages on 1 and 2 simultaneously. edp1 will accept ch. 1 messages and pass ch. 2 (i think...if not, split your midi cable to both units.) this will allow for stereo operation. do the same, but have the presets for edp1 and edp2 seperately. now they should function fairly independently.
this is all just in my head though...never actually tried it, so it may not work.
-jim