Nidalee is still a problem.
If I recall correctly the changes to Nidalee were focused around making her cat form more rewarding while lessening her constant harassment with spears that could destroy team fights if someone got hit by one. Before her rework, we can all agree, her spears were terrifying. She would sit in the back lines and toss javelins rapidly until someone important got hit and then the team would go in and it would be over. After her rework... It's still the same. Nidalee spears still hit for over a thousand damage through 200+MR, they still instill a sense of dread and they can still ruin entire team fights. Now she has the kit and damage of an assassin (Gap closer, high mobility, high burst damage, execute), with the resilience of an average top-laner and the poke of a long-ranged mage. Couple all of this with a champion whose kit contains a lot of disengage (eg: Janna) and you're left in a very frustrating situation where you try to counter her poke with a strong initiation and just get completely cockblocked. It's not healthy, it's not fun to play against and it's still a problem.