David, I'm not sure but that sounds somewhat like the way I plan to run the NYC part of my layout. We've run it that way a couple times so far, although I usually run by myself so operate in the more conventional way. In my case the layout is U shaped, two peninsulas with backdrops dividing each one into two scenes (freestanding). So I have four visable scenes and fairly extensive staging on the bottom level of each peninsula. My somewhat limited aisle space is intended for use of the operators of the JGL on the top level, the NYC is mostly just main line running, along the HUdson River. So, an East end and a West end "dispatcher" (not sure the term dispatcher is correct for my use here) bring trains out of staging, on a schedule, they are seated near each end of the visable layout, and only see their train thru the first scene. They then pass control of the train to the other dispatcher. This is the part that sounds like what you talked about. However, in my mind this situation makes great use of DCC. A dispatcher selects a train with his throttle, starts it in motion and verifies its speed as it goes by. He then "dispatches" it (Digitrax's term for releasing a selected address back to the system) and it continues on its way, not assigned to a throttle. The other dispatcher then selects it and gains control of it. When it passes thru his scene, he then directs it to a staging track at his end. Doesn't sound like as much fun as the more usual follow your train around, always in sight type operation, but there is enough volume capacity to keep things busy, and operators switch "jobs" a couple times during a session to get to do other things as well.
Gary