I don't believe we should start blaming the airframe. If this was a turbine casing breach/overspeed event, that's not assumed in the certification. Hence O/S protection and no turbine containment device for the shrapnel.
I also recall 2 pilots in Aberdeen suffering a high pressure fuel fire in the AS332 Engine bay shortly after taking off on a test flight. The reacted promptly, the fire extinguished 6 seconds after the warning activated, if my memory has served me well! They completed the circuit they started and upon landing, were horrified at the extent of the damage.
If my memory can be relied on a bit further, I recall the Norwegian AS332L1 suffering an engine overspeed that resulted in the turbine bursting. That one took out the MR Hydraulics and fired shrapnel into the occupants. The resulting conflagration did not permit time for a fire to become the salient point. Loss of control and impact the the sea finished the job sadly for all of the occupants.
I am surprised nothing has been released thus far seeing as the Pilot survived the event. The initial sequence and cause of the fire need to be identified quickly enough for the rest of us operating/flying the type to understand how we can mitigate.
Ultimately, we bear in mind aluminum is a bit like butter in a microwave when subjected to fire and the composites are stuffed full of things that will burn nicely. Fire sucks. It always has I think if we consider every serious fire event, Concorde etc.
DB