They did underperform: The LGD we saw winning the split was not the same team that went to worlds. EDG is a milder case, they started falling off by the end of the season and lost all their charm, and they did well in their group except for getting butchered by SKT. People who pay attention to the CN scene could have told you that betting on iG is like playing Russian roulette, except that their bot lane performance skewered their chances of getting out of groups.

Besides, OG and Fnatic are playing really, really well. OG managed to iron out a lot of their problems and Niels is on fire, it's a shame we won't most likely won't see them play vs Fnatic until next split. The Fnatic we see now is not the Fnatic we saw play vs UoL, bootcamp seems to have really helped them out.