Saw some posts on reddit today and went to try it out once for testing purposes. You can start duels in the new KC tournaments with decks of any size. I went in with just 5: 2 BEWD, Lord of D, a flute and sphere kuribo. I immediately surrendered because I don't want to get my account banned, but I've been beaten twice by this method as well. May want to avoid the new PVP until they patch it...