riot i think you will have to buff and nerf other classes to coincide with these ADC changes
Assassins, tanks and enchanter supports to be exact
Assassins will need nerfs, they are already doing great right now and with several indirect buffs on the pbe via item changes and nerfs to early adcs themselves this should be a given.
tanks or tank items more likely will need buffs, adcs will gain around 30% more damage to tanks if the current pbe changes go through. Buffs to tank items will also have a knock on effect to tankier bruisers hopefully
Enchanter supports as a whole may also need looked at, but specific nerfs should be directed to janna and lulu (shield duration)