“What I wind up doing, as far as blending FX chains, is to connect “externally” my H9000R to a Switchblade GL unit. It effectively allows me to include my H9000 in my guitar rig as 4 stereo “analog in/out” or “virtual H9″ units, and I can do any cross-fade or blend from the Switchblade and control all cross fades via MIDI expressions.”
This is an excellent workaround. Since you are controlling the blend via midi (expression) then it seems to me that the expression control could be linked to a fader which can then be automated or manually controlled from within the daw. Is this a valid thought?