All I will say is if either Yu Na or Mao skate event decently at Worlds there is absolutely no way they will be below Miki Ando. Ando cant even do triple-triples that get ratified anymore, does 5 triples a program on a good day, still has mediocre non jump elements, and her programs are an utter bore. Ando wasnt even good enough at her best to beat a really good Asada or Kim, and she is well past that point now. If she won Worlds again at this point in her career that would be a sad thing for womens skating, so for that reason alone it should be a welcome relief Kim is back.
Of course in Mao's case she is such a disaester now she could easily not even make it to Worlds. However if she is on the podium at all that will probably mean she atleast performed decent and if she performed decent she will be above Ando gauranteed.