1: They did nerf Zeds ult damage
2: That item has a 120 second, that is unreliable due to it auto going off if you AA someone, and if you decide to back out of the fight before you even finish your combo, you just completely wasted your passive and doing like zero damage
3: Idk how he has limited counterplay, he has the most out of ALL The assassins, his Q is a skillshot avoidable, his WEQ combo is very easily avoidable, due to having to go through the W and Q animation, effectively making it a lot slower.
4: After about the 30min mark it becomes really difficult to keep doing well on Zed, since by then everyone has Zhonya's or QSS which effectively null A LOT of his power, removing dusk and his death mark.