Americas - B+
While it wasn't a perfect performance by the Americas, especially against the 2 EMEA super teams, the Americas still had 4 teams make it to the 3rd round, and had the least amount of teams eliminated in the first round, and outside of the 2 Talon upsets, American teams generally didn't lose any games they were favored to win.
EMEA - C+
It was really hard to grade EMEA. NAVI and Fnatic looked so good that they could dominate every LAN this year. But outside of the top 2, EMEA fell rather flat, having 8 of their teams go out in the first two rounds (4 getting first rounded.) I think EMEA is going to be dominant internationally, but domestically, it's shaping up to be a snoozefest.
Pacific - D
DRX looked great. Talon and Secret looked solid. If I could grade them alone it's easily an A-, but SEVEN teams from APAC got first rounded. The only saving grace for the league not being as lopsided as EMEA is that we have seen how good PRX and ZETA can be at peak form.
Bonus - China
D as well imo. Can't really give them an F because they were competitive, but they both got first rounded, so rip.