I think it's time we actually nerf Riven.
62% win rate in Diamond. 56% win rate in Platinum. 50-56% win rate in Gold, varying.
As someone who's been playing since Season 1, I honestly do not understand how she is considered a balanced champion in Riot's eyes. Her cooldowns are so stupidly low for the amount of damage she does, and if you play a champion that relies on an animation longer than .5 seconds, then good luck to you, because she's going to cancel the shit out of it multiple times with her stuns and knockback, PLUS get out of it with no damage taken. Think you're getting that CS? lel, nope. She's cancelling your auto. Think you can kill her within three seconds of burst she does without being animation-canceled? Think again, because Courage of the Colossus makes her unkillable. She takes zero damage from trades now with it. Think you're going to be able to tower dive her when she's at 200 HP? Nope, because she's going to hold you in place until your children finish college and blow you up. What's that you say? Your team will get her? Wrong again, friendo. Riven's mobility is on a virtually zero second cooldown. She's already on the other side of Runeterra by the time you close that gap.
Champions have been nerfed for less. Champions have been nerfed for having a 54% win rate. But Riven? Hell no. She's so fast and mobile that she's avoided Riot's balance nerfs for years.
Seriously though, can we reduce the damage she deals? Every year she gets stronger and stronger as power/mobility creep rises, and she's seemingly immune to nerfs. Riot even buffed her this year.