Just a comment .....
I am not a conspiracy theorist. But I do know a bit about the search area.
It may not be as busy as Hong Kong harbour, but I do find it odd that at early morning, during daylight hours, that no one saw this aircraft in it's final moments.
I know that weather would have caused conditions of limited visibility and it's a big ocean.
And even if seen then, crew on small surface vessels may not have any capability to report until they return to shore.
But it is usually pretty busy with all types of surface activity in that region.
Of course we must just wait and see. But I do find it a bit strange.