The Cebu 330's are 300's so don't have the centre tank activated which reduces the range as compared to the -200 but the bigger issue with them is that they have the machine configured for 460 odd seats, which is an incredible number of punters
https://www.seatguru.com/airlines/Ce...c_A330-300.php
The Qantas 300's have about 296 seats.
https://www.seatguru.com/airlines/Qa...s_A330-300.php
I can't imagine doing Sydney to Melbourne in a Cebu machine let alone medium haul...
You would have to wonder at what point the reduction in personal space/seat size etc has to stop before they seriously hurt someone..