I have a general problem with the southern search area.
Altough we have no confirmed track across the peninsula we do have received information regarding the general direction of the aircraft. If was reported to have crossed the peninsula on a southwesterly direction to then turn to a northwesterly direction.
The above could be explained in a catastrophic event with a direct-to entry followed by a heading mode.
Hovever, to then go to a southern route you would require some human intervention. And such intervention comes very late for 'cabin survivors'.
As a consequence the southern route is not possible in the event of a catastrophic failure.