Apart from shutting down the wrong engine, all the DFDR trace tells me is that #2 engine didn't fail...
The failure sequence isn't #2 eng fail, #1 eng uptrim, #2 eng autofeather. It is infact #1 eng uptrim, #2 engine autofeather, #2 engine roll back. #2 engine didn't flameout, it remained running until the end....
Both engines responded exactly as designed to the commands they were given.
Uptrim/Autofeather was commanded when there was nothing wrong...