I don't think Ashley was underscored at the Olympics. Other skaters may have fallen, but Ashley had numerous mistakes that added up. She had many two-footed jumps, an underrotation call, and an edge call. Those errors all diminished her GOE. With all of those mistakes, I didn't understand why she was so happy after her performance, and I knew her score wouldn't be that high. Her placement was fair, given her lack of technical content compared to the skaters who placed above her.
Her spins are slow and the positions are pretty weak, but that's okay if she can get all of her levels.
She doesn't have the skating skills to perform an explosive, level 4 step sequence. Her step sequences are labored precisely because she doesn't have the edge quality/skating skills of the top skaters.
Compared to the top skaters, Ashley is limited technically. She's been very overrated for a while, and I suspect she will retire without ever winning a medal at the World Championships. I suspect she could even be the third-placed American at this upcoming World Championship. She is being surpassed by young skaters who have superior technical abilities.