We don't care. Yes, it may have been fun to ward hop, but it was broken. Yes, it may have been fun to smash your face on the keyboard and get a pentakill, but it was broken.
The new katarina actually allows for her opponents to react instead of getting instakilled with no possible hope of reacting. And she takes skill now. If anything, she's probably stronger than she was before the rework, its just now you actually have to learn how to play her well.
So please, shhh. No matter what you say Riot is not going to revert her back to her pre-rework. And for a good reason too, because this rework is fair for **everybody**. Marksmen, squishies, immobile champs and even katarina.