Ok, so, Zed is at a weak spot right now, he got much more powerless with the Assassin Update, his winrate decreased and he lost popularity.
Now as a Zed Main, I think he is really balanced the way he is now (Patch 7.3) and i don´t see why you would indirectly nerf him in the next patch.
First, Yoomu´s lost 5 lethality.
Black cleaver lost 10 AD which is very important for Zed burst.
All the Masteries he uses got nerfed.
BotRK got nerfed too.
And the last whisper items got a slight nerf too.
So, please riot, do not kill Zed!