PPPAAAAARRRTTTTAAYYYY!!!!
Jokes aside though, the effectiveness of the nerfs diminishes the lower you go in ranked, or the more chaotic/disorganized play is. So the way I see it her pick rate is going to go down quite a bit at the start but somewhat recover after some time.
I don't think she's dead in any ways, shape or form but...at least we should see less of her. Rez is still the most powerful non ult ability by a wide margin, and lord knows bad rezzes won't always get punished.