The new oracle ability is pretty crazy. Basically get a fully charged void ray instantly, I'd say it's even stronger. I was messing around with this earlier. You can take down everything soooo fast, and they're a fast unit, so escape is easy.
As with every MLG I'll do the most watching on friday, friday usually has the best games and the best production since it's planned in advance. I wont really watch at all on saturday, too much going on, difficult to follow. And on sunday I'll keep an eye out for who's playing whom, and see who ends up in the finals. But I wont be watching too much on sunday.
Also, New HotS patch, no balance changes just Bnet and UI changes.
I fooled around with the new physics last night, the only one that really does anything is the tank. Shooting a marine ball with a bunch of tanks is ridiculous. You can't even see what's going on, it's just a 'fireworks' show of marine parts.
As someone stated in the reddit thread, no one seems to have tried the nuke yet.