Bloggs , since you insist, I most likely would have had approx. 3t arrival at AD. The forecasts indicated no need for more. As Lookleft has pointed out, an easterly wind would not have raised much interest. The temp split of 1 or 2 degrees you see regularly. There is much more to fog formation than just a low temp split. So, arrival at MIA would have had approx. 2t, straight in via the RNAV, and no, I wouldn't have waited for QF. Had the information about the missed approaches at MIA been received in time, (it wasn't), then continue on to ADL for an autoland. Happy now? There was no indication at departure that anything other was likely to be needed.
Jack, yes, And will be interesting to see if anything changes. There have been some company changes already.
BPA, Amen.