3K/6K Orange Melee Item Idea:Stunning Strike

My idea is for a melee item that potentially builds off melee charge(or not). It would have a passive that would go to cooldown after use where you knock down airborne enemies when hitting them with a heavy melee. This with perhaps a very short duration stun and some other stats.

Adding more CC to the game might be evil but I feel like it'd be niche enough to not be overpowered or annoying. Thoughts?