Riot should just nerf everything solely based on what is currently meta in pro play
Pro teams get to play and study this game full time and so they've done the number crunching and have usually found what's the strongest in a given patch. This should make it easy for the balance team to always know what they need to nerf. It would make pro play way more interesting too since they'll have to spend much more time theory-crafting to find what's best for every patch. They're paid to play this game, it's the least they can do for our entertainment and the game's health/balance.