Will SKY make any roster changes next year?

I assume you mean SKT :p.

Anyway I don't really know, as you can make a case for everyone except faker to get replaced or to keep.

Huni didn't played bad during worlds, honestly. He wasn't the reason why SKT looked shaky. Besides if the meta switches again to more carry orientated champions, Huni is one of the best ones out there. And who would replace him? Untura is a team-play toplaner, which was great during this year as Top lane was more about tanks, then really fighters/splitpushers. The only way I think Huni will get completely replaced (and not share the role with Untura) is if Kahn, Curvee or maybe Smeb joins SKT, and I just don't see that happen.

Peanut is just not a great tank jungler; He is much better with damage orientated/playmake champs like Lee-Sin, Elise, Nid, etc. If the Meta swtichs again to those junglers, Peanut might return to his RoX strength again. They still got Blank as well, which does better in this Meta it seems. But Peanut seems a likely target to get replaced though.

Blang played bad this Worlds, and during the LCK summer split as well. If I had to pick somebody to get replaced just from performance, it is him. He solely lost two games in my opinion in the finals. But he was the star ADC during last worlds. He might just be in a slum, or just badly adapted to this hypercarry meta, and he has been a core of SKT for a couple years now.

Wolf is in the same boat as Blang. He just doesn't seem to be a good enchanter support, as he just doesn't seem very impactful in the game. if the meta switches again to much more team orientated supports and engage supports, he would most likely do a lot better.

That's just my opinion. Honestly I would just stick with the current team for at least a couple months; See how they perform with the new rune system, and how the meta starts to shape up. If they are still underperforming I could see them replacing all of them honestly.

Most likely as they made changes even when they were winning big time

Yes Hunis play style of split pushing is nice but he can’t or rather won’t tank

ADC Just really hasn’t been performing too well. Maybe it was the mets