I have a couple points on this. IMO G2's style of always looking to make a play, immediate crossmap reactions, etc Work incredibly well against other EU team, NA teams, and Korean teams, b/c those 3 regions have been playing a more standard "play safe and farm up" style of league and haven't really caught up with the overall meta changes from season 8 and 9 that have made the game much more rewarding to successful agression.
And so in the west, and as well vs korea in MSI, G2 proved themself became known as the innovators and the stand outs, and also to a degree shaping the meta with their drafts and playstyle.
The problem is, people forgot that china has been largely playing the fast paced, aggressive playstyle for the past 2 seasons. Outside of RNG who have a much more standard playstyle, the other successful LPL teams had already embraced the higher aggression playmaking style, as well as willingness to try different strategys, for example remembering s8 worlds a game where Ning was on kayn, and the support roamed with him and helped him powerfarm to 6 and then he took over the game as red kayn.
So while G2 stood out in the west as innovators and meta breakers, LPL teams had been testing and refining a similar high aggression playstyle against each other for the better part of 2 years, And FPX largely though the mid jg combo of Tian/doinb and their combined playmaking along with solid bot and toplane came out on top of the LPL.
This tournament, as well as MSI, g2 had not yet played against a team with that agressive playmaking play style (even to the point where sometimes it looks like theyre hard forcing), and it showed, for the first time in the tournament outside of the 2 losses to griffin in groups, G2 was forced to be reactive (outside of earlygame game 1 when they had the lead), this was a complete 180 from the SKT series where even when SKT had a gold lead G2 was able to be the more pro-active team.
