Since damage is too high how about you revert patch 7.22 base damage increases?
Patch 7.22 notes
You know the patch where you thought Runes Reforged **reduced damaged **in League and proceeded to buff the base damages of a lot champions like Zed and Talon LOL. Seems like this would be a pretty easy thing to do.
While you're at it how about you hire some testers that are at least semi competent at their jobs so you dont come out of pre-season saying damage is lower when its actually massively higher.