What were you thinking with Xayah?
She can spam Q for a good amount of damage which effectively zone you out of much farming at low mana cost (you nerfed Lucian's range precisely for that reason, and MF's doubleup damage even though it actually takes some skill to pull off and not nearly as oppressive,) an ult that removes you from the map, safe from harm, only to hurl down another crap load of goddamn feathers, at which point all you have to do is auto -> E for a free root, which for some reason does a ton of damage. You build her around attack speed, but you gave her strengths of a caster. The result is a busted marksman that works well with and against any bot lane matchup. So let's go ahead and nerf Jhin again and make him even More useless :D
It's honestly as if your balance team doesn't play this game.