Last sattelite traces of plane are from 1000km west of Perth
Not to nitpick but the report says miles not KM. If it was 1000 km it's conceivable that the plane could have landed in Western Australia but 1000 miles likely means it ended up in the ocean. Sounds like after his joyride up to FL450, 40000 ft/min descent roller coaster, and deceptive course changes, he decided to head for the place where the wreckage was least likely to be found, the South Indian Ocean.