This will probably open up a can of worms as far as aircraft handling goes. IE: Qantas ramp and cleaning commuting between 2 terminals for Qf and customer aircraft, and the same for QF Engineering if they ever intend to take back contracts (this will be the final deathbed of that dream). And similarly for contractors who service our brands and other customers.
Reminds me of a whacky plan to shutdown all aerobridges at around midnight. That died a quick death after they realised that people actually work on the aircraft after passengers get off.
Hopefully they will provide a free and convenient means of commuting between the terminals for the travelling public (like some other countries do).