If the pilot had a health issue, unless something massive, you'd a think he'd call for help from the crew, or call a mayday
Remember, these Airbus's are side sticks so their is nothing to fall on if he is incapacitated...
Where does that leave us...
I still think autopilot was programed to take them down. There is a report from CBSN that they tried to climb at the last minute.
“Where does that leave us...”
With an amazing set of coincidences.