"Hide Eye Candy"
"Some of our more competitive players requested the the option to hide some of the less subtle movement on Summoner's Rift. We added the option to disable things like butterfiles, dragonfiles and the water wakes to help competitive players focus on what they care about, the gameplay. "
Right...
And skins with completely different visuals and particle effects don't impede on clarity more than "butterflies and water"?