Alena Leonova did fine at Worlds (4th and 2nd) after twice finishing behind age-ineligible Adelina Sotnikova, so I don't think having a National champion who can't go to Worlds is a problem.
Sotnikova and Lipnitskaia were the start of the Russian wonderbaby surge. They were mopping up the medals in the JGP at the time and their performances were viewable to anyone who wanted to see them. If they were also topping their elders at Russian Nationals, no one would have been surprised.
That is nowhere near the current situation in US figure skating. Alysa Liu has competed internationally as an Advanced Novice skater. For the US ladies on the World team to be defeated by a Novice skater at US Nationals can't begin to compare to Leonova back then.
Anyway, I'm not convinced Alysa really does have the capability to deliver two clean programs while all the top age eligible contenders are likely to falter.
From what I have gathered, Alysa has had more failed 3a attempts than successful ones, and her lone 4z attempt was a failure.