Nidalee's nerf wasn't necessary
Before you downvote this into oblivion, please read everything. Nidalee is very similar to Lee Sin. They have access to an execute at level 1, and they both have a ton of FREE mobility in their kits. They also have a lot of sustain built into their kits, allowing them to jungle or stay in lane a long time. But they don't scale particularly well into late game. Like Lee Sin, Nidalee falls off pretty hard late game compared to other assassins. IMO, Nidalee's biggest strength his her early game. As stated earlier, her late game is absolute garbage, so she truly needs her early game power in order to do well. As annoying as she is, Nidalee was in a pretty healthy spot before her nerf. Maybe a few slaps on the wrist were necessary (mana cost increasing, etc), but her damage was fine.
(oh boy if you have ever seen a late game/fed Poppy)
. That's actually quite a few. And that's only the ones that I can say are strong (this isn't based on toxicity, otherwise the list would be much bigger)