I also put in a request ages ago for this as well as VC just doesn't work smoothly for me either (for years now!). I want to use the TI as a midi keyboard controller via usb and just play the TI's audio live via analog outputs. This seemed like a very odd request and it took a few emails explaining it, but in the end it was a big "no".
When using USB, local off is automatically set to prevent set errors. When you are using USB, you are using a sequencer, in this case, you should use the sequencer to route ALL of your MIDI. This does not prevent you from using the analog outs (even with VC). In this case, you can use splits and everything your sequencer allows you to bend MIDI.
Your request is odd in a way that it is not the 99% setup and personally, I think it is not a proper setup and possibly error prone.
-timo