This may seem like a rude question but is honestly asked: What is gained by flying a machine round this route - as opposed to running it in the SIM?
From an outsider's point of view, if they can reconstruct the flight path, then they have already learnt what the machine was doing 'on the outside' but that can make zero change to what they know about the events on the inside of the machine.
This flight looks more like a publicity event for the investigator and a tribute flight as an expression of sympathy for the friends and relatives.