So 3 years to compile a report which says we don't know what happened. We found something that might have caused it, but we sent out a memo about that 2 years ago, so job done. Next!
Honestly, why do we bother with all this palaver for an accident that killed two people? Tragic that it is, if the same two people had died in a car accident on the way to the aerodrome before the flight because perhaps one of them was doing something that he probably should not have been doing, like perhaps speeding, but we can't confirm it, it would have made the news for a day and be long forgotten.