Thats the thing though, they're picking her even against stuff like Void and ES on the other team. Usually thats VERY risky but they don't seem to care.
Edit: Ok let's see how she does vs two good counters here Gm4 (Puck/NS).
Games 2 and 3 Na'vi picked shit carries. Those drafts honestly made no sense; almost like an avid Twitch watcher was like "Oh man, this is totally going to be awesome" without understanding how the heroes work together.