A skater is capable of demonstrating the most difficult transitions and the best basics. Patrick Chan is one example. Kostner shouldn't get one of the highest TR scores just based on quality when there are skaters that have both.
Kostner often get lower TR score than the top 3 girls. She should only get lower TR score than maybe Mao Asada at her best. So I disagree that she was overscored.
Remember before they changed the rule to let so many girls getting level 4 step sequence, only Kostner was able to manage to add enough steps and turns in her step sequence to earn level 4 consistently. You don't see it because it doesn't look like work for her. Everything looks very easy and clean.
Which of the girls have both? Now you're comparing a girl to a boy.