YOU PEOPLE ACTUALLY THINK 10% MORE DAMAGE ON DEATH MARK EARLY AND INCREASED W SPEED.

Ignoring his W also has 100 more range.

If it doesn't they're adding a new AD assassin item next patch. Not that I want zed to be strong again. Edit: I was a bit wrong on the time, yay more time with weak zed!

Source: http://www.surrenderat20.net/2015/11/red-post-collection-trial-of-kraken.html#11 Longer term: We're seeing a number of AD assassins, Kha'zix and Zed especially, struggle after the preseason changes. We believe that's due to the removal of Brutalizer and changes to Last Whisper. We'll be looking to add a new item to help them out as a result in one of the first patches next year.

Zed is already "viable"

He is a decent assassin that has strong push as well

If you want more assassin power he needs to lose wave clear/push

An example could be

Buff his Q ratio by .2 AD but it does 50% less damage to minions

Trading split push power for assassin power/ team fight power

Zed is good because he can play very safe without worry of resource

Even losing lane he can farm with shutikan very well

He is a "safe" assassin

Why does everyone say Zed is weak? His stupid manaless poke still does 2/5 of my health when combined with his shadow after he gets half an item.

+100 range on W brings his effective WQ poke range up to 1500

That is higher than Xerath's fully loaded Q with 1400 (which is supposedly an ARTILLERY skill, one of the longest in the game)

Granted he still needs build adjustments (since AD items are heavily favoring Marksmen over Assassins now) but he'll become more annoying to play against, and he was already one of the most unfun champions to face off against in the midlane with toxic laning patterns.

added 100 range to living shadow