Here are my proposed changes:
After swapping places with a shadow(reactivating W or R), Zed's next basic attack withing 2 seconds deals 20% tAD bonus physical damage.
- bonus AD ratio 90% >>> 100%
- projectile speed 900 >>> 1000
- tAD ratio 100% at all ranks >>> 50/75/100% tAD
Why should Zed be changed?
Currently, Zed is hard to punish in lane because he can farm safely under tower with his passive.
Zed does too much damage with R > E > basic and, if fed, can kill targets without hitting a Q.
Why should Zed be changed this way?
Passive: One of the most fun thing to do when playing Zed is the W > E > Q > W > basic combo. His new passive would have great synergy with this combo and encourage agressive plays, rather than farming safely under tower.
Q: Zed's Q by itself is very unsatisfying. Late game, hitting a basic attack can do more damage than hitting a Q. Also his Q is very slow(for comparison Blitzcrank's Q has 1800 speed, which is twice as fast as Zed's Q). Those changes aim to make his Q more reliable and rewarding.
R: His R does too much damage by itself and he should rely more on hitting his Q's.