I went the 'tasting menu' given the length of flight. It was good - not outstanding, but what I've come to expect from QF F. Unfortunately the beef was overcooked.
The seasonal dish was another spanner crab dish - essentially the one listed on the menu was a warm option and the seasonal was a cold option. I effectively ended up having both as they brought me the incorrect one - the one on the menu was better than the seasonal dish.
Menu on the return DFW>SYD was certainly nothing to write home about. Effectively just the J menu with one additional small and large plate.