What if Yasuo could only Proc his Tornado on Champions?

Before you insta-downvote, I am asking this question to Yasuo Mains because I am curious how this would effect him.

The idea would be something like:

#Steel Tempest

ACTIVE: Yasuo thrusts his sword forward, dealing physical damage to all enemies in a line. Steel Tempest can critically strike and will apply on-hit effects to the first enemy hit.

PHYSICAL DAMAGE: 20 / 40 / 60 / 80 / 100 (+ 100% AD) Hitting an enemy champion grants Gathering Storm for 10 seconds. At 2 stacks, Yasuo's next Steel Tempest is empowered and will consume all stacks.

Empowered Steel Tempest EMPOWERED: Steel Tempest unleashes a whirlwind that travels an extended distance, dealing the same damage and Airborne icon knocking airborne all enemies hit.

I understand this is a nerf, but how would this negatively impact him specifically? Keep in mind when answering that Yasuo would be able to get compensation buffs if it makes him too weak in trading. I am seriously curious as to how this impacts laning phase, teamfighting, and whatnot because I don't play yasuo.

Edit: just for a bit of context, I am trying make a rework concept for Yasuo by keeping his core strengths and playstyle but removing some of the hard to balance areas of his kit.