Question about designing Yasuo's Windwall

Out of pure curiosity, did Riot ever discuss why they chose to make the windwall something that lingers instead of just being wooshed out and gone? I don't really have any bias towards or against the skill, but I sorta think people would be less frustrated if it was just wooshed out, blocked all the projectiles it touched, then was gone.... and just had a lower cooldown? Not saying it would or wouldn't be better, just curious if such a decision-making discussion was ever had. I don't really know how I would google that...
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