You could put each EventValue in its own MIDIOutputController and collect all of those into a Mixer that you play in parallel to your Sound. That way when you make changes to the EventValues in Kyma, those changing controllers will go to the MIDI output as well as controlling Sound parameters. And when you send MIDI input from PT, it would control your Sound parameters. Assuming of course that you have properly mapped MIDI controller numbers to EventValues in the VCS, for example.
As long as PT does not echo MIDI controller data that it receives, this should not create a "MIDI loop" so you should not need to switch between modes.