Zhang got 1.60 goe for her spiral!! And that is actually too much because she almost does not travel on the ice. the only time she got zero goe and level 1 was because she rushed through it and didn't hold the positions long enough.
Even in the SP, Zhang had 4.8 on the spiral, which was the highest-scoring spiral along with Mao's (4.8). What do you mean she traveled no distance?! She most certainly traced out a serpentine in her COE spiral, and completed the circle (of half of the rink) in her backward Biellmann! And she does not stroke especially much before and in-between her spirals. This is the standard spiral layout for most ladies. It is Carolina who travels little in her spiral sequence, choosing to trace a figure 8 along the
width instead of the
length of the rink. Now that's unorthodox. A few year's ago, that kind of spiral pattern would've received automatic deductions.
Maybe Caroline's a little slow getting through her spirals, but she has the distance and the right amount of
edging, too. Spirals are
supposed to trace out a big circle along the border of the rink, not squashed into a tiny circle. It's because she's small and light that doing the same pattern means that she looks like she has less of a lean. Laws of physics, can't get away from it. Imagine the rink to be 50% bigger for all the other girls, if they had to trace the spirals along the borders, of course their edges would be shallower too!
I actually think stretch is TOO rewarded. this is skating, not rythmic gymnastics

: a spiral is not only the free leg position but should also take account of what you do with your skate (you know?)
It is not just the stretch of the free leg, also the back, and especially the skating leg. It is much harder to do the spiral with a straight skating knee than bent. Take a look at Caroline's knee, and then Carolina's.
Two other things to look at, especially in the COE spiral, are the smoothness of the change of edge (Caroline is the steadiest among the current ladies, IMHO; Michelle's COE was also stellar in this sense), and also not dropping the free leg when going from a freely held leg to a catch-foot one, or vice versa. This shows strength, a "true" stretch, and stability of edging. Caroline's spiral is also excellent in this sense. The lack of speed is the only reason why she's not getting more +3 GOE's in her spiral sequence.
In the current rendition of CoP rules for the spiral, it's a mandatory level 1 if the free-standing spiral is not held for at least 3 seconds. Along with other current rules on the spirals, the free-standing spiral is almost always the front end of the COE spiral. If you start the spiral a little late, it's easy to get level 1 -- this is what happened to both Caroline and Mao when they got level 1 spirals this season.