I don't think any T1 team will be picking Koalanoob up. He's decent but his agent pool is severely limited. There are a lot of younger talents that deserve way more.
His Raze is lackluster, his Jett is okay, his Omen is okay too and his Yoru is great, but nowdays we got lots of young duelists in the market with better mechanical skills that can play Jett, Raze and Neon really well, learning Yoru and Omen wouldn't be that hard too.
Even though TSM didn't perform well, Sym is a really good duelist, mada as you said is a really good pick as well, and NA already has really good duelists in the league that won't be dropper off like Jawgemo, Zekken and Oxy. Koala getting a spot on a T1 team is unlikely.
koala can easily function as a flex player as he was at the start on m80. eg is prob going for a complete rebuild around derrek and supamen. if c9 drops runi or xeppa then i could see koala going there.