Is Renekton honestly that "weak"?
Sure, despite having "eh" winrate of 48% while having 7% playrate, I really don't see the point of buffing him at all. Dude can just dash up to your face, hits you with an empowered W where it stuns you for centuries, enough for Renekton to land an extra AA then a Q, and then dashes out. He's just absurdly aggressive & tough to go up against if you're playing something like Gangplank or even Riven.