We have done something like this by using a single OverDrive template for both shots. The 1st camera shot would be in program and the 2nd camera shot would be in preview on the same MLE. Then we attach a custom control that performs a cut on the "on-air MLE". So you hit the custom control when you want to move to the next camera shot. You don't see the 2nd shot in preview, but you also don't loose your video/monitor by preparing another OverDrive shot.
#OverDrive