Ao Shin - Revisited Kit

So; I had made an Ao Shin kit quite a while ago, I wanted to poke at him again since he is my favourite champion, even though he isn't released yet (I love dragons). I can see what they mean by him being a hard champion to create since they want to do something fun with movement. If I get something better, I'll add it to this one. Here's what I have, though!

Passive: When Ao Shin hits a champion with an ability, he gains a +20 movement speed buff, stacking up to x5. The buff lasts 4 seconds, and gaining another stack or hitting a champion with an abiity resets the cooldown.

Q: Ao shin fires a bolt of lightning that deals magic damage and applies a slow to the target. Ao Shin can charge this ability for up to 1 second to increase the slow. At full charge, the bolt can pass through 2 units before hitting a third, slowing each one passed through by a decreasing amount.

W: Ao Shin spins around, damaging, knocking up targets in range and applying a slow that does not stack. Allies in range gain a movement speed buff.

E: Ao Shin transforms into pure lightning, ignoring unit collision and dashing forward a set distance. If Ao Shin touches an enemy unit while in this state, he damages, saps movement speed from them and his dash is extended. This can happen for up to 4 units, and each unit affected cannot have <ability name> used on for a short time. The cooldown for this ability increases with each unit passed through.

R: Ao shin transforms into a tornado that sucks up enemy champions. This ability can be used a second time to throw all champions in a target direction, stunning them upon landing. The longer the tornado lasts, the less distance they are thrown. If the champions are not thrown, they are dropped and have a large slow applied to them.

Just a rough concept. I'll do more specific numbers later, but I want to hear what you think!