Yeah, since it's all in korean/chinese times it's really shitty for NA viewers. Always like 2-5am start times for me over on the east coast. They did mention they will do a "second" broadcast I think starting around ~11am est or so, but as others have said, they will all be on their lolesports / youtube streams so you can really watch them whenever.
Honestly I hate it though because I will always spoil the games for myself and then it makes actually watching the series not as enjoyable. I'm tempted to just go to bed by like 8pm so I can wake up by ~4am just to watch some games live.