Actually there was a news report on this in New Zealand this morning. Both the Doctor that attended and the poor chaps wife 'praised' Jetstar and the crew for the professional action that was taken. Just because it was Jetstar doesn't mean it was a debacle.
And by the way, BA does NOT carry body bags, do a google search and you will find an incident from around 4 years ago when a few passengers were miffed because a 'corpse' was placed in the rear row of business class on a flight from the Caribbean because the aircraft was full in economy.