Nidalee will never be balanced

Until she has ranged scaling and resource-less skills on low cd. Ranged scaling will always be a problematic mechanic since champion doesn't have to build towards it.

Before rework, she could one shot, post rework, she now two shots. Now before you say "dodge", she STILL doesnt have to hit most of her spears. One hit and she can insta gib someone with takedown.

There are no resources required for her Cougar form abilities, hell even her Cougar form itself doesn't cost anything. Hunt resets Aspect of the Cougar's cooldown if Nidalee is in Human Form... why? like 3 secs wasn't low enough to spam?

Now how would you balance her?

1. Replace ranged scaling with proper AP scaling. Let her build AP to actually do damage instead of "lol 50% down with one ap item".
2. If you are going to keep her ranged scalings then add stacking mana cost to it.
3. Add mana cost to her cougar form itself and the abilities in it....

You have basically given her free resource-less damage via distance and cougar form.