Analysis of the flight data recorder would take longer, Hananto said, because investigators were examining all 72 previous flights flown by the aircraft.
So they are not only examining the famous "what does it do now", but also "did it do that before"? Interesting that they look at all the previous flights, is there some pre-existing malfunction suspected? Do they need to calibrate some models?
That includes audio from the previous flight and the beginning of Flight QZ8501, which crashed around 40 minutes after takeoff.
100% Audio coverage is a very positive thing. That may help a lot.
Overall it looks like some more professional people are now on the job. The Statements given do make much more sense than previous ones...