There's a lot of on demand mobility
You click a button and you get to move to point B asap this is becoming too familiar for new abilities, but what if using some mobility took some investment? What if we made that a champion theme?
So how about switching up new mobility to be ramped up on:
I reckon it's a novel idea that mobility comes in after a little investment, if we copy pasta'd the above I'd also add in pivots between attacks so your movements weren't so predictable.
Here's a quick thought experiment on a passive:
Whenever you hit or get hit by something you gain a charge. Abilities cost charges; CDR/Mana reduces charges required to use abilities [caps at 'y' charges(?)] Charges degenerate outside combat.
Q is a conical attack (costs the least charges W a shield (costs more than Q, less than E) E a dash (costs the a lot up front but becomes cheaper the more you use it) R a steroid (consumes charges over time and increases its effect over time: like a slow eventually becomes a stun)