I have a hard time believing that Yu Na got anything less than a standing, roaring ovation after that perfect skate. The Canadian audiences know what they're looking at. They know the technical achievement she did, and perhaps more importantly, the mental one in overcoming the intense pressure on her. She could've skated to Ke$ha reciting the phonebook and they would've given her a standing ovation.
But I agree with your assessment of her program. It's actually my favorite competitive program of all the ladies this season. It's serene, joyful and yet has a sense of fun and flirtation (though the last two surely comes from Yu Na herself). I love the little bit of footwork sequence with the 3salchow sandwiched seamlessly in. She just floats across the ice like a watercolor brush to the peaceful yet delirious music. And yes, the music is peaceful, but it is by no means bland, it's got dynamics and rhythmic variations and color, all of which the choreography interprets beautifully. It's a very sophisticated work of art and a delightful contrast to her raucous, crowd-pleasing short program.
I'm so with you. I was so worried at first at her unusual choice of music - especially after the rousing Scheherazade of the previous season - and even after I watched it for the first time at TEB I was still feeling unsure, but then I realized that it was simply the most INTERESTING program I'd ever watched. I began to appreciate the transitions, the flow, the capricious changes in mood, the fun and the intensity. The music is extremely unpredictable - David Wilson talked about how difficult it was to edit Gershwin - and that in itself made skating to it such a challenge. There is no single way to pin down this program, it's simultaneously coy, sophisticated, even humorous. I'm both awed and thrilled that Yuna's Olympic season program was this one.