it's not like the first and the second. all skaters learn how to jump as well as they are visiting choreography classes. no one skips choreogrpahy. but some girls are naturally artistic, and some are not. just look at shcherbakova at 10, she's already such a star
the same was with baby gubanova. of course everyone improves with time, even if you are not a natural performer you can make your pcss decent. but it's not the system fault that nastya are not as good as the other girls at her age
Nastya is stunning among others of her age.
ET students do have choreography classes with former Bolshoi ballerina. Nastya's PCS is more than decent. She and Sasha Trusova have posture problems but that's ok because they're just 13 and they came from different school.
Shcherbakova and Medvedeva, who don't have that problem, grew up training in Sambo-70.