Mostly just what’s being played.
From the V Jump Twitter, Editor Aikawa (who deals with a lot of V Jump’s YGO stuff), mentions the World Qualifiers are generally seeing a lot of play from Star Seraph Scepter and Sovereign. Meanwhile, about half the Decks being played are Shaddolls.
Also the top 4 players (the top 2 going to Worlds for East Japan) consisted of 3 Shaddoll Players and Infernity Player who splashed HEROes?
The Finals are
Koyanu (Star Seraph Shaddoll) vs yoshix (Infernity)
X (Star Seraph Shaddoll) vs JOKER (Soul Charge Shaddoll)
Winners are yoshix (Infernity) and X (Star Seraph Shaddoll)