Um no, Yuna doesn't have the most difficult step sequences, since she often only gets level 3. Her Sochi stsq in both programs had lvl 3, Carolina got more GOE's than her in both programs and Mao got higher level and more GOE than hers in the LP. Also how can one have intricate yet not difficult steps? Upper body movements affect edges? That doesn't make any sense.... clearly you don't know what you're talking about.
Sochi stsq has been analyzed globally by many people, the consensus is that Yuna's stsq is both difficult and had quality and disagree with level 3 judges given to her. Sot is the only one who received lv4 in both SP and LP in sochi, do you think her stsq is better than Mao then?
I am not an expert of course, I pointed out some aspect of stsq that people could consider.

