Nidalee
So, what are the chances we'll finally see real nerfs come to this toxic champion? Highest ban rate at worlds and second highest for the rest of us. She's been a reoccurring problem ever since they gave her jungle capabilities. They keep giving her minor nerfs to try and keep her in check, and so far nothing has worked. At this point, they need to take away her capabilities to hunt jungle monsters and put her back in a lane, or better yet, out of the meta. If you go back through the history of the forums, a reoccurring trend is topics about her being overpowered and the only people who like her are the people playing her. A champion with a history like this could warrant a rework, like Ryze has gotten before. Few champions regularly maintain ban rates as high as she has since becoming a jungler without getting nerfed. I feel like she's getting the Lee Sin treatment, where riot knows she's overpowered, but they don't want to nerf her because she's flashy and fun to watch in competitive.