Diana has a shield and can build Hourglass
Fizz has E and Hourglass
Ahri has ult and Hourglass
Akali has stealth and a movespeed boost, as well as Hourglass
KassadinHasNoEscapes.jpeg (He can build hourglass)
Hourglass is an item, you need to build it for it to be effective. So it's an investment, similar to if Zed builds QSS. It also leaves you in a fairly shitty situation in 2.5 seconds in a lot of situations.
Diana has a shield and can build Hourglass
Rengar has bonus resists and a movespeed boost
Which mean nothing if you try to get away with building what Zed does, you'll live an extra .1 seconds.
Ahri has ult and Hourglass
Yi has meditate and a movespeed boost
Ahri and Yi aren't really assassins.
Talon has stealth and a movespeed boost
Akali has stealth and a movespeed boost, as well as Hourglass
KZ has multiple stealthed movespeed boosts, and his jump if he gets any assists
Which leaves them all very vulnerable to any form of stealth detection. As for short burst movespeed as an escape it's never as good as simply blinking away like Zed does.
KZ has multiple stealthed movespeed boosts, and his jump if he gets any assists
(I'm going to add Kat here because she fits very well too)
This is what the OP is suggesting for Zed, he would effectively only have an escape if his target dies, as lets be realistic, the first person to die in the majority of teamfights would be Zed's target anyway.
Fizz has E and Hourglass
KassadinHasNoEscapes.jpeg
Fizz is just as bad as Zed, I mentioned him. Kass honestly has major design flaws, I doubt his design will ever be balanced in both competitive and casual play.
Other assassins can just die if they go onto a target with an hourglass. If I dive a Syndra as Akali and she hourglasses then her Thresh throws a sweeper on my shroud I'm either down a flash or dead. Maybe if I hourglass I can force a 1 for 1, but I'd have to play incredibly well at that point.
While Diana and Rengar can survive this scenario in order to do so they have to build very defensively, at which point they're more bruisers than assassins.
If I pull the same bullshit as Zed I can just press R again and act as if nothing ever happened, in fact I come out a little ahead because hourglass's cooldown is longer than Zed's ult.
You arbitrarily decided Zed should be the only assassin in the game to die if his target has Hourglass because you dont like him
Using your logic Zed would be fine, he still has his W blink after he ults in.