Sea is doing pretty good
Korean team look quite lost (Nuturn last hope )
Jp easy target (Nth look promising tho )
Sa - no one expected them to beat dk
Personal Opinion
bit too early to call - RC (JP) completely surprised me by taking a map off FS (SEA) (on their map pick too). As you mentioned Nth is doing really well, and if seol/meiy/sugar can maintain the same form vs GE/F4Q in lower bracket I can totally see them getting to lower bracket finals. (hoping their match vs PRX tmr goes for 3 maps)
F4Q, assuming they beat GE, will have to face Nth again most likely, so they're probably out. I'm not ready to discount DK yet, they pulled off some pretty good performances in KR playoffs (hell, they beat nuturn) and kinda pumped to see if they can redeem themselves vs. Boom.