Having just updated, I am extremely impressed. I find the aesthetics overall are bright, attractive, modern and clean. I feel it fits well with the iOS 7 scheme. I think Qantas are finally on to something good with their app design.
I didn't understand why Qantas don't work harder to combine all your related bookings under the one booking itinerary. For a trip to New Zealand I have upcoming - wouldn't it be nice to click Manage my Booking - and have all of my flights, activities, cars and hotels bookings immediately available on the one page? I realise we are halfway there - flights and cars are shown, but activities and hotels are still absent. I can't help but feel it would encourage people to book their entire itinerary with Qantas if it were all possible to view the itinerary on the one page, and manage it just as conveniently. I messaged RedRoo with a query to this effect and was advised that with so many partner companies it's difficult to manage. I just wish it were possible.
And Qantas appear to be getting a little closer to the mark - the app allows you to view (separately) your flight, car and hotel bookings. Unfortunately, my 3 hotel bookings aren't shown - perhaps I should be worried?
Either way, the User Interface appears much improved, and I'm actually quite excited with the direction Qantas have taken with their app. It's a very good start, and hopefully they continue to develop the app in the same vein.