Past season Carolina was better at Worlds than before Worlds (including Euro).If carolina skates the way she did at euros the match for gold will be asada vs kim
Now Carolina works seriously on jumps. She restored 3Lz. She doubled both 3S at Euro, but may perform them normally at Worlds.
As Kiira Korpi (who newer was excellent jumper) she at this season has programs with (potentially) 3 triples in SP and 7 triples in FS.
Carolina has very good PCS now (for last years), so Mao needs very serious technical content to win her.
Don't forget Liza and Adelina, their technical level may be very high, Adelina's PCS are also good.
These five (Mao, Yuna, Carolina, Liza, Adelina) plus Ashley are main pretenders to Worlds Medals. Six Ladies for three medals.