After watching the preliminary competition, here is my Top 15:
(in no particular order)
Albania
France
Panama
Vietnam
Argentina
Iceland
Philippines
USA
Bangladesh
Kenya
Sierra Leone
Brazil
Mexico
South Africa
Colombia
To complete my top 20:
Bangladesh
Panama
Myanmar
Puerto Rico
Venezuela
My top 5
Philippines
Albania
Puert Rico
Iceland
Sierra Leone
France looks like Stefania Fernandez x Alyssa Campanella
Sierra Leone is channelling Tamaryn Green
Myanmar is sweet and I love her performance.
Philippines is unstoppable. But a back-to-back is kind of hard to achieve with IMG so I'd settle for 2RU.
Thailand faded away. I am not sure about her.