Billy I tried to respond to your PM but it said your inbox is full.
Originally I had designed the Melbourne and Sydney stations with a single track and platforms both sides for fast off/on but as all trains will have 15 minutes for off/on there can be a track either side of a central platform.
This in turn allows four trains engaging in off/on at stations while three are in the tunnels.
The schedule could be northbound 8.00am, 8.30am, 9.00am, 9.30am, etc. with southbound 8.15am, 8.45am, 9.15am etc.
Even though frequency would be half hour, because of the 5.6m wide carriages allowing 10 seats per row each train would take 2,000 passengers in comfort.
The problem is there are 25% want maglev, 50% want HSR and 25% want to just use more planes on that route but if most people want Maglev then it would happen.