Sadly, nothing seems to have been learned from previous pilot suicide/murder crashs that would not have happened without the bullet proof cage in the pointy edge of the plane.
Minutes before the crash the co-pilot left the cockpit to the aircraft lavatory. The captain then manually changed flight altitude from 38,000 feet to an altitude of 592 feet below ground level. He did this three times, according to investigators. He also retarded the throttles to idle. He also repeatedly manually selected the maximum operating speed (Vmo).
One the cockpit voice recorder sounds were heard of someone pounding on the cockpit door.
ASN News » Investigators: LAM Embraer 190 accident likely intentionally caused by pilot