Quite often when in a holding pattern with as little as 1000ft vertical separation, things look alot closer than they actually are.
For this reason when holding I always attempt to make a PA to the pax informing them that we are holding, and that there are other aircraft holding at the same time.
I also mention that there is at least 1000ft separation just to let them know because in years gone by pax get off aircraft talking of "close mid air collisions" etc.
Its not their fault.
Similarly when departing from say runway 34R Sydney on the MARUB departure we advise the pax that we will be levelling out at a low altitude and there will be quite a large reduction in thrust.
Pedantic - maybe, but the punters should be made aware of anything that just may perceived the wrong way.
As for QF and Jetstar we dont know the facts so it would be both unprofessional and premature to speculate until the facts have been made public and investigated by the respective authorities and companies.
Otherwise, its the standard media circus with no facts and lots of hysteria.