Ted S.,
One feature that you will not find in anyone's layout control system is randomness of a scenarios.
JFC454 hit the nail on the head with the benefit of the sensor track to a scenario - having a consistent location for triggering events.
The iPad track representation was never intended to be a complete layout diagram - it was meant to detail areas that needed management or control - like real railroads - switch junctions - interlocks - yards - passing siding - etc.
One can get quite a complex scenario with the Legacy base? Cab2 system with a few sensor track or sensor track hardware attached to an LCS WIFI. This permits the use of any track. Other devices like the switch controller or the SC-2 permit control of any switch motor.
I believe a basic reason that you don't see many layouts on auto pilot is the reason that we build them - we all enjoy operating the railroad.