Balancing but without numbers

Instead of always trying to adjust the numbers of abilities that almost always breaks champs, why not try to adjust the size or hitboxes of abilities? I mean its clearly possible with kayn during the odyssey event. I mean lets say Brand's W is too weak and doesnt do enough damage, then just make the W's size bigger so its easier to hit and more damage can be dealt over a wider area. I mean thats not the best example, but I think that changing how big some abilities are would be a decent way to balance some champs