The NA hype this year didn't even make sense. Just because TSM started adopting a Korean schedule doesn't mean they'd be up to their level. They only started at the start of the split while Korean teams have been doing it for years. Sure they can win games by gaining an early lead and snowballing but Korean teams just have way more experience. Either ahead or from behind, they have more experience on what to do at every situation. I don't think NA teams know how to play from behind, specifically TSM who just try do crazy, Immortals-esque plays whenever they're in that kind of situation.
TSM dominated NA because they had strong lanes and they knew how to play around their strong lanes and close out a game, but what happens when they're against a team that has stronger lanes than them? RNG showed us what happened.
Next year maybe, if they choose to stick with that schedule.