Aurelion Sol passive fireballs suggestion
If their movement was fluid as opposed to "fixed at x radius around him",
look in this game, when the character moves the fireballs around him move fluidly, a player could make use of this.
It'd be cool if they gained some momentum when you were moving foward (to keep up with you), but when you stopped they'd continue and hit behind minions for example. So you could kinda throw them at your enemies.
Now they feel like they're part of the champions graphics, as opposed to looking like his magic.