Miki planned a 2a-3t in the FS and has been doing it most of this season, the 2a was just shaky so she couldn't pull off the 3t after it, as evidenced by the step out. Also, she knew what the other ladies were doing, which probably influenced her decision. She knew that Mao and Kanako did not skate their best, she knew that Yuna was only planning 6 triples in the FS and hadn't competed all season and would probably make a mistake or two, she knew that Alissa doesn't have a 3-3, that Carolina wasn't doing any 3lz in her program, and that even with their 3t-3ts Alena and Ksenia would likely not beat her so long as she was relatively clean. Further, she knew she could likely skate a clean/nearly clean LP as she had been doing them all season and had been getting good scores for them as is, winning the LP in all the competitions she competed in. Why go for a 3lz-3lo that often gets issued UR or DG calls and forces her to do 3f which is an inconsistent jump for her also prone to getting URed or DGed when she doesn't need to? This season, Miki didn't need the 3-3 to win, so she didn't do it. Simple as that. It's called STRATEGY and she and Morozov are experts at it. In 2007 when she needed the 3lz-3lo to win, she always went for it. Even last year at the Olympics, she went for the 3lz-3lo in the SP because she knew she needed it if she wanted to be in striking distance of a clean Kim with 3lz-3t and a clean Asada with 3a-2t. The difference between Miki and Yuna is twofold: 1.) Yuna's 3lz-3t (3f-3t earlier) is a very consistent and powerful combination for her. She almost always hits it, very rarely gets UR calls for it, and gets huge GOE for it. This is NOT the case with Miki's 3lz-3lo which is not consistently clean, rotated, and beautiful. Often times the landing is wild, the second jump is deemed UR or is downgraded, and even if she does land it well she doesn't get much +GOE for it. 2.) Yuna can't bank on skating a clean FS like Miki can. The 3-3 is the least of her worries, but it seems like she always messes up the flip or the salchow and sometimes both, so she needs to always go for the 3-3 so she can afford to make a mistake or two elsewhere without taking her out of it. Also, where she already opts against doing a 3lo, she has no choice but to include the salchow and flip. Besides the 2a-3t which Miki sometimes has trouble with, with little exception you can expect her to land all the other jumps and combinations planned in her FS without fail, you can pretty much bank on her landing at least 5 clean triples. Yuna usually only lands 4 or 5 clean triples in her FS as is, so if she took out her 3-3, that would drop down to 3 or 4, which likely would have bumped her off a few podiums in her career.