1) good flow, energy and execution
2) good speed during sequence
3) good body line and full extension
4) minimal delay between spiral positions
5) good flexibility
6) creativity and originality
7) ability to attain positions and variations quickly and effortlessly
8) element matched to the musical structure
I'm pretty sure edging is part of the first bullet in terms of "execution", and that bullet is one that is credited to YuNa.
Looking at the words used and the groupings of the first bullet I tend to see "execution" as the overall performance of the sequence - ie shape, pattern, size of the seq; any arm movements; any character involved; focus; etc. . Things that are more intangible.
To me, it seems that the edge quality is something that they don't want to get into evaluating as far as how good it is. There is a -GOE for poor edge quality and that is easy to see. But it's harder to say what degree of good edge quality should set the skaters apart. Especially when they all pretty much use the same pattern and large looping curves.
Plus sometimes a really good edge will kill the flow of a sequence which would make that grouping void itself...
In Yu-Na's case, I don't see any edges that I haven't seen before. She does the inside spiral but her edge is not so deep - the pattern and shape of her seq. preclude that.
But her general performance of the sequence was good. SO she gets the bullet but not for "edges".