Why don't they make the cooldown on Zed's Q go down when you level it up?
Why doesn't his E cost less energy when it's leveled up?
Why don't they at least try it out in the BPE?
The way I see it, Zed is only getting picked a lot because he's fun as ****, not because he's a good champ. Sure, if you play him well you'll find yourself doing great things, but that's because of your skill, not because of the champ. This champ does allow one to express their skill level at the game more upfront than most champs, but once you fight people of the same skill you soon understand that Zed isn't that great late game. His poke before a team fight leads him having nothing during the team fight itself, unable to use skills after a simple poke, or unable to do your full damage in a team fight after poking with one of your skills. This is due to energy most of the time, not cooldowns.
If you wanted to remove the skill factor from Zed, you could just have it so his energy is refunded and his cooldowns are returned when he ults, but I don't want that, no one does.
However, if, at late game, his energy costs were lowered on his E and the cooldown of his Q was deducted throughout the game, then I can see this being a great thing.
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This is another, more skill based and fun alternative.
Zed's Q has a high cool down compared to it's cost and damage, And the fact that it's damage is not that great, it makes you dependent on combos that run you dry. So, why don't they simply increase the Shuriken's base damage late game, or it's ratio goes up when he levels it.
Lastly his E doesn't do a lot of single target damage unless you combo it as well. Zed is a combo relient champ when it comes to damage, but doesn't have the ability to finish a combo.
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Another alternative would be to make his W give him more energy when he lands a second Q or E. Also allow the third Q with his ult give hime extra energy as well. This will encourage those "Cool Guys don't look back at explosions" after landing a tripple Q.
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The most badass alternative
After you land a tripple Q on a single target, you get your W off cooldown along with energy to perform it. This will make the High risk High Reward chamber so much more rewarding for it's high risk, and encourage it to a high degree of skill and game play.