the 1 thing that really does not sit well with me is that the FO was breathing normally and never said a word yet people were screaming in the cabin
knowing people that have had strokes/seizures it is highly possible that breathing can stay in a normal state and not a sound be made also can send them into a disorientated state and or followed by a state of unconsciousness
this is in no way a me being an armchair investigator just putting it out there i just think its unfair to say at this early stage of the investigation