Hi Grizz...tx, nice to see you here too - it's good to be anywhere these days '-) !
The failure of a major part of the aircraft that doesn't have a history of such failures, is certainly concerning. Payload calculations will obviously be a focus. Terribly tragic, including the loss of experience and knowledge. Remarks by FDR and others tell us that this was a good and very competent company doing the work and the testing.