Rochette landed 3 clean triples (the initial lutz, and the 3T^3S sequence). She doubled the second lutz and the second salchow, and took major dings for the landings on the 3F and solo 3Lo. Joannie 3 spins were all L2 and she didn't get much +GOE on them. Her spiral was noticeably wobbly, and was only L3.
What killed Mirai was her low PCS scores, not her technical content. She was so concentrated on landing her jumps that she forgot about presentation; meanwhile, both Lepisto and Rochette got very high PCS despite Lepisto's easy jump layout and Rochette's multiple errors.
Both Rochette and Czisny medaled based on their huge SP point cushions. Lepisto medaled over Mirai because Laura got a 5.36 boost in PCS. After all she is the reigning European champion, and there were 6 European judges on the panel.