The text mentions A, B, C and E class airspace. Why would you think that reads G too (surely it would say D and G if it meant so).
Doesn't Mackay and Rockhampton provide E almost to the ground (700AGL from memory) during out of tower hours. The catch being it's actually done by a Terminal Controller, rather then an En-route controller looking after half of Queensland. What safety benefit has it provided and at what cost? I'm sure ASA would be happy to put in all the services you want, if your willing to pay for it.
The current ATC system doesn't really have much space for all these new "terminal E sectors" but now you also want to cancel OneSky that has the potential to expand and improve current practices.
PS: I'd be interested to hear about these US controllers who are doing Upper airspace sectors and terminal airspace, maybe you could fly a few of us over for a fact finding mission.