If Yu-Na used her 2007 programs at the Olympics it would be a different story. Those were 6.0 worthy. Unfortunately both the quality of her choreography and the emotion that came out in her performances dipped after that season.
Sadly, I agree with this assessment. Those two programs were my favorite of hers. It's a shame that she never skated "Lark" to its potential. I wouldn't mind if she brought that back.