Either way whether a deliberate act or an underlying medical condition was the cause it's just as well that this guy is out of flying.
ATC should be able to tell if he was climbing then descending (providing they had him on rdr) due only a single axis A/P engaged. If this was the case being a put act on then he went to a lot of trouble faking it.
I guess his best plan would have been to return to MIA & land. But like all of us if he was indeed ill then we all tend not to admit it whilst under some level of pressure so as not to appear to be a failure. He's alive, no one else got killed, no aluminum got bent so that's that!
Wmk2