Keg,
You seem to have your finger on the pulse....
Not really. I have an insight but that's about it. In terms of the question you ask the short version is 'I don't know'. QF is a wonderful airline but they change plans on a regular basis. I don't know if they feel they have a moral obligation to honour their LOIs or not. I reckon they should but others with equally valid opinions may disagree. You need to hope that someone with my point of view is the person making the decision.