Multiple Camera Support & Advanced Parallax Rigging

This mainly applies to characters and rigs with the head-turner and/or other parallax behaviors enabled. There are two parts to this feature request.
1) Please add the ability to preview and face track on multiple camera inputs at the same time on a synchronous subject (i.e. 2+ cameras front and rear, front and side, etc.)
2) Allow for automatic switching of cameras based on face tracking such as if the main webcam loses face tracking or stops recording but the integrated webcam still has a clear angle of the subject. Or a tracking status indicator by camera to aid in calibration for multiple camera inputs, and to aide in manual camera switching.

I have a use case where I would like to have a close-up cam for more detailed shots, however I often face 90* to a secondary screen to press controls or make adjustments to the scene. I continously lose calibration, but adding in a way to pause the tracking or quickly switch input cameras without having to go back to the camera panel to manually recalibrate.

Bonus feature request: A dynamic recalibration indicator to allow actors to quickly reset eye and body tracking without having to press a hotkey or panel button.