"attracting flyers with its double-decker layout, and on-board perks such as first-class cabins and cocktail bars."
First Class cabins? What will they think of next?
Remember the swinging 70's when QF's 747s had a bar on the upper deck? They took them out and put more seats there. Economic necessity or health and safety issues?
"Passenger appeal is a paramount concern and all the passengers I have had on QF EK and SQ Dugongs have loved how quiet and roomy they are."
They obviously haven't heard the complaints from the pax on the lower decks (apparently the soundproofing in the ceiling isn't so good and people tromping about on the upper deck are annoying the cr@p out of the people below)