One thing concerning the track, from my understanding which may well be at fault, is that depending on the speed the track can vary by a huge margin so at best the search area is the a most likely. It is even possible that it was flown to say Christmas Island where the casino is or to any patch of ocean in between that and the current search area from the evidence we know about. The ping data just about supports this if the speed is adjusted.
That suggests to me that there is other information that has not been released but rather "suggested" by other sources to the SAR teams that solidifies the best guess to a highly / only probable search area. I am keeping my fingers crossed that this is the case for all concerned.