It would therefore be reasonable to assume that Foreign Affairs would have a
large say in the final version of the ATSB report.
Not a reasonable assumption at all. DFAT would have neither the expertise or legal authority to have anything to do with the final report. They wouldn't even qualify as a DIP.
The problem came when instead of continuing to 2000 and commencing a 3deg path from there they set the altitude to the minima resulting in a unrestricted idle decent. Giving the aircraft no chance to get back on profile.
Terrible
use of automation and display of mode awareness in my opinion.
Exactly. Read the report of the similar incident in 2007. The crew set the minima for a NPA, selected FLCH and then watched passively as it dived for the level set in the MCP. This seems to be an issue that should be addressed by the airline through training.