Zed - Solution to complaints
Okay, I play Zed a lot, and the biggest overall complaint isn't Zed himself doing his job properly. It's more of the split pushing aspect that seems to be the biggest problem. And I main mid and Zed is one of my go to champs due to his ability to split push or nuke in fights.
The solution:
Make his W no longer amp his AD, but make is amp all physical damage to champions by the percentage of your bonus AD it currently has now (as in adding it to the damage making it nearly equal to what he has now), reduces his damage to towers and minions and lets him kill champs all the same.
This isn't the only change, as I am also going to put a little bit more counter play into his ult. His ult currently does some upfront damage that is amped at the end in part of the pool of damage he has dealt. This makes it kind of deceiving. Make the ult do all of its damage at the end with the upfront damage put straight into the pop instead. What this does is allow you to pop some kind of damage reduction or even cleanse/zhonya's his ult more effectively. Now some would say I'm hiding damage, but this puts more value into counter building or even counter playing him and he would lose a tiny bit of the extra little damage on his ult since it won't self amp itself.
I'm just tired of the complains about Zed, and he honestly isn't that bad. And I would be fine still playing Zed with these nerfs. I don't want Riot to pull a Kha'Zix on him. I want him to actually still remain viable but not overly powerful after the nerfs.