"OMG everyone is just playing AD champs because they're so OP wtf Rito!"

No, you dolt. The reason why AD champs are getting played everywhere is because the majority of the new items and item changes affect them, plus the ADC pool has had a large number of reworks. Everyone wants to try out the new changes, and when you have three out of five people every game wanting to test out the new Graves or Quinn or whatever, you'll obviously get people running them in different lanes. I'm not saying anything about actual balance, but try to understand that for this Preseason, we WILL get a lot of full AD comps because everyone wants to play Graves, everyone wants to build Death's Dance, everyone wants to try out Warlord's Bloodlust. That's what Preseason is for.