When you nerf the crit mastery and yasuo and trynd at the same time
Don't be surprised when it turns out months later you went too far considering the mastery alone is what pushed them over the edge. Because prior to this mastery being introduced, they were both balanced champions. And you folks at riot balance have a tendency to nerf champions directly and indirectly at the same time when it's likely only one of the two was needed and you creat larger problems for champions down the road because you forgot to think for a few minutes.