Riot should stop releasing new Champions
...and focus on half of the current Champion pool that are completely and utterly useless in this meta. Literally deactivate them and release them back one by one until their kits are of 2015 standard.
Before every game I can honestly name 5 or 6 of the Champions that are gonna be picked/banned. Botlane is a combination of Thresh, Leona, Vayne and Jinx. Jungle is either Shyvana or Yi. Mid we're talking Ahri or Ekko or Yasuo or Annie. Top it's Gnar, Vladamir or Riven or Tryndamere.
And I'm not even going to get into the clusterfuck of items Riot has introduced over the last three patches that have single-handedly propelled a handful of Champions into top tier, while leaving everyone else in the dust.