DERG
I don't disagree, but not only is your view a bit simplistic, there is question whether an Oil Fire caused the burst.
For instance, as old engineer writes, the Oil's temp rises gradually, and not even to flash point (by measure at the scavenge inlets). Now this doesn't preclude Fire, but, an Oil Fire by definition is an oil fed fire, and there seems to be no Oil missing from the system.
Oil may have accumulated as solids over time (as coke) in critical locales, but no theory of actual fuel for fire is offered. The authority, ATSB, has offered that an Oil Fire "may have initiated a sequence that resulted in Uncontained release", etc. But the theory of bearing heat obtains just as well.
What is the mechanism for fire to be located in the "Annulus" between HPT and IPT? How did the fire heat the Drive Arm from its aft portion (Not known), when the fire was located on the forward side of the disc?
Question. On Figure 8, at the Fan, take note of Blades that appear to have been damaged. Notice two blades past the spinner's top, at ~10 o'clock. Illusion?