For the love of God Riot
Nerf and/or rework Zed.
He is definitely the most broken champion in the game. (Which is saying something since there are several). I just finished a game where a Zed literally won the entire game by himself even though he was the ONLY fed champion on his team. The rest of his team had 19 kills and 42 deaths combined. We had a fed Anivia, fed Ashe, and fed Volibear yet he was still able to literally kill our entire team. He finished the game 26 kills with 4 deaths. We hit him with literally every CC we had and he still literally won the game by himself.
I know people (Zed mains) are going to be replying to this saying "He's balanced" and "His win rate is low" etc. But the only reason his win rate is low because so many people that don't how to use him properly, play him. Once a player has mastered Zed, he can literally take him into ANY matchup with a very good chance to win. It is so frustrating to make great plays against him and still get outplayed due to the champion being so broken.
Kassadin and LeBlanc have had balancing nerfs and are still VERY strong, it is way past time Zed joined them. (Please don't bring up the very minor nerf Zed got to his attack speed, it made pretty much no difference)
or
depending on what you're playing and completely mitigate his Death mark. Also for him to actually assassinate anybody he needs to be in your team's backline. Leaving a lot of the new Tank meta to cc him making him just a squishy caster in the middle of your team.