To be fair, the three girls who were expected to make the podium (Akatieva, Samodelkina, Zhilina) all didn't have a great competition. Obviously they all were amazing and the quads which were done were done very well, but Akatieva wasn't performing as much as she could in either segment, Samodelkina tripped a bit in her step sequence (such a shame because I love that step sequence), and Zhilina just wasn't having a great competition. At their best, I honestly think they can challenge the trio. And keep in mind that they are younger, especially Akatieva and Zhilina who aren't even internationally junior eligible. To be completely fair, Sasha/Anna/Aliona weren't that exciting as 12 year olds (they were really great, but not as exciting as the potential of these three quad-wise or full-package wise).
And actually, Sasha and Anna's SS are noticeably weaker than the average. Sasha's spins are very average. Anna's combo jumps are a bit muscled. Alyona has a weak I-spin and a leg wrap. Samodelkina, Akatieva and Zhilina on a good day are above average in SS, have pretty good flow in their combo jumps, and have good flexibility. Obviously they have other faults but in certain areas they are honestly more "full-package" or have more full-package potential than the 3A at this age.