Hey
I found another solution for the cut track - If you right click n it and de-activate it and then right click and go into properties and de-activate it in there as well it seems to work fine - without adding your stuff to Sequencer
In terms of the visual aid - thats somewhat useful but even when i click realtime it doesnt seem to update alll the time . What I was saying if you had a way to visualize it off the camera so when you are in the top view or front views you could see general guidlines as to where things will appear on the dome - so if you had spokes that showed the zones radiating out from the camera with to close to the camera zone and visible far away markers - 
something like this but spherical that can be seen in the ortho views - just an idea - i can just attach X’s to my camera and make them not render. It would be more important for the stereo for sure - most stereo 3d renderes in DLC softwares have this