I think the beauty of this routing configuration for MIDI FX is that it keeps your MIDI source and destination on just the one single track in the DAW versus creating an additional synth track and choosing the MIDI source as the input for the VSTi. I've never seen anyone else do it this way so kudos to you for showing us how. Haven't tested this yet but I'm guessing you could add several MIDI FX and have them sending on different MIDI channels to different VST instruments within the same multi instrument. This would also give you the option of sending the MIDI output of one MIDI FX to different synths based on pitch i.e. by splitting the keyboard etc
Hey I found your video on kontakt in reaper and setting up midi super helpful. Could you please make it so its not "meant for kids" so I can add it to a youtube playlist?