User blog comment:Ysana/Champion Versatility/@comment-1990160-20130127205617

Riot wants their designed champions to fit a certain design concept or playstyle. For instance, Xerath was conceptualized as a long range artillery caster. However, he was played more effectively as a burst mage. Thus, Riot nerfed his R to create a playstyle more similar to their original idea. Riot aims to create champions with unique playstyles, and often the "versatility" that players find clashes with the design ideas. But Riot is the game god, so the players will always lose.