I agree they should go for a full Korean speaking roster (-Rossy even though he's individually good) where Xccurate speaks korean--assuming he speaks it well.
I sort of have faith he can do it though, he learned and used to IGL in mandarin for Tyloo during his CS days and gave some pretty banger performances at some majors.
There's a very clear issue regarding Izu and Sayaplayer; they're both good on duelist but Izu is only really good at Omen when put on smokes and Saya can't play smokes at all. If we're speaking long term you have to drop one of the two and put the other on perma duelist while you find a better smokes player.
I'm inclined to keep Saya even if he has slightly worse fragging because of his proficiency with Neon which we're seeing become more commonly used across all regions and I haven't seen Izu's Neon yet
I'm also not big on keeping Carpe after his performances the last 2 years, I used to have faith but not anymore, especially now that he isn't igling. Maybe bring in K1ng
Izu/Saya - Duelist
Stax - Scan Initiator
Xccurate (IGL) - Flex
? - Smokes
K1ng - Sentinel