Singpilot had it right.
In my opinion the most important part of the a/c to recover is the CVR. The FDR will only reveal the 'result' whereas the CVR will provide the 'why'.
As I have mentioned before, understanding what was happening in the cockpit after 0135z to around 0209z is far more important than the last 5 minutes. Loss of IAS, Q-corner stall/overspeed, ACARS etc. are all part of the 'result' and neither should have happened. So understanding the 'why' will be the most enlightening part of this whole sad event.
mm43