There are Better Ways to Nerf Zed
Nerfing Zed's mobility like this will make it impossible for him to team fight, the second he goes in against any good team he'll be CC'd and killed, and there's nothing he can do about it. Unless the ADC gets completely separated he'll be useless. This will force him to have to split push even more, which clearly is not what you guys at riot do not want after those attack speed "nerfs." There have been some pretty neat ideas suggested even on these boards targeted at other parts of Zed's kit if you really think he needs a nerf in this meta.