Takata
Having a camera showing all the displays and crew actions (postions/attitudes) would be very helpful rather than having to derive something from recorded data which doesn't give any hint about what can NOT be derived. (e.g. was the PNF reading silently the documentation? was he scanning the displays? looking at the PF actions? did they exchange meaningful regards?)
A lot of things needed to understand their actions are lying in cockpit ergonomics and pilot's way to deal with the interface. Most of what would be very helpful to investigation, in this case, is lost without a camera record. About the flight data missing, it seems that it would be better/easier to have them directly recorded rather than filmed.
I could not agree more. Many investigations comprise a group of 'subject matter experts' listening to noises on the CVR and trying to work out what it was - who was in the cockpit, what was the FO doing etc etc. Or trying to infer from the FDR what was on displays. But every time cockpit video recordings are proposed the 'professional pilots' rise up against the idea. They would rather have investigations fail and others of their number die due to repeating the same error, than have their actions recorded in the way the cashier at a 7/11 gas station is recorded.
I doubt if recommendations from this accident will change their minds.