NA this year looks a lot better than NA last year going into MSI. C9, IMT, and arguably CLG/TL/NRG all look to be world class... Last year there was maybe a single world class team in NA from the entire year. And the mid tier NA teams improved drastically as well. Current CLG vs last split's C9, current TL vs TIP, NRG vs old TL, it's just a step above. and it's undeniable that the top two right now (C9 and IMT) are miles ahead of the top two last season (TSM and CLG/C9 depending on the split).
I think top of Taiwan is only slightly better than NA. Taiwan tends to have unique style that sometimes works really well, and other times falls flat. Don't forget that both CLG and Pain beat Flash Wolves at worlds. They also beat KOO. Taiwan has always been an interesting but inconsistent region. NA improved this split, Taiwan seems to have stayed the same, so I doubt that would change much.
Oh and btw, Taiwanese region absolutely has no depth at all. Once you get pass the top like 3 teams, the skill drops off HARD. I think it was one of the LMS analysts who said something like "Our 1st through 3rd teams will give IMT and H2K a challenge, the others would be wiped away by Renegades". Like it drops from world class to barely NA challenger level.
Okay I agree that Korea is miles ahead of the rest, but you're exaggerating. Sbenu isn't going to shit on H2K or IMT, that's just silly. I agree that the top 6-7 of Korea are also the top 6-7 in the world (only CJ is debatable).
The way the regions always went was Korea>CN/EU>NA/TW>WC but China had a big fall. I still think EU is very good and if any team region would pull an upset off a top 7 korean team, it would be a European one. That or Taiwan, haven't been following them this split, and tbh they don't get enough challenges in their region for me to really be a good judge of those teams. It would still be an upset imo, but still