How about creating more "immobile" champs
The meele ones cause we have mages how pay with mobility for their range, but we dont have for instance tanks who pay with mobbility for capability to both deal and take the damage (that niche place is totaly empty, and only partialy tapped by fighters, who are medicorly tanky and deal considerable amount of damage, still they jump around like anything else) i personaly love such a playstyle of slow moving, heavy guy who's main task is to find a way to actualy use his power (something like nautilus in the new cinematic)