Elise went way overboard
With a ≈54% win-rate and a pretty strong pick-rate, it's absurd how well she's doing.
No matter how well you play against her, she's so safe that any lead she has will end up being your doom.
She's also probably the best counter-jungler around and it makes dealing with her a living hell since she she farms even better than she ganks.
They over-tuned her, and it's pretty obvious something needs to be done about it.