Just a couple of ideas since we are on the topic.
It would be amazing to be able to use belacanto to register and bind an osc path to a parameter in eigenD. For example suppose you wanted to control FX1 send level via OSC.
register osc path "/osc/FX1/sendlevel" to FX1 send. Now eigenD will instantiate an OSC listener that responds to this osc message. I guess this could also be done in a mapping file statically so that you can create maps of OSC messages to parameters in eigenD.
In that way, we could write our own interfaces to control eigenD in elegant ways, we could share these patches in MAX or M4L or whatever and it would ease the load on your dev team.
for outbound OSC, a mapping file where you can map controllers and such to whatever OSC messages you want would be ideal.
The exception to that would be for NOTE events and midi over OSC where a standard protocol such as what is proposed by Symboliic Sound would make a lot more sense.
I realize this is not the highest priority but it doesn't hurt to start floating these ideas now.
When eigenD is Open-Sourced, maybe you can get help from the community.