There is literally no other explanation.
Rite2Ace has been playing sova for the past 1.5 years. He played smokes this tourney.
Deathmaker has played nothing but jett in the past 1.5 years, he was joined by mw1 who also only plays duelists (reyna and jett).
Hellff and Amaterasu have to compensate on their behalf due to so many duelists stacked in the team.
They also let go of one of the best flex players arguably even in SEA (VibhoRR got some nasty clutches against full sense and practically carried VLT) for mw1 who has had 0 pro play in the last 6 months but he is good and full of potential.