Just looked up the current nerfs on the PBE:
Precision Protocol (Q) bonus damage on second hit lowered to 70% from 100%
(Thoughts:) Honestly, this isn't as big of a nerf as it sounds, since she still converts a crap ton of it to true damage. It was in my opinion, dealing a bit too much dmg because of that, this should be fine. (Don't start on Fiora talk... thats a whole other bag of worms)
Tactical Sweep (W) Slow lowered to 60/65/70/75/80% from 90%
(Thoughts:) This will probably not be felt all too much really, I mean, yeah its a huge nerf to the slow especially since this is usually maxed last, but you have so much mobility in your kit, that you probably wont feel this nerf. much.
Hookshot (E) :
Mana cost increased to 70 from 50
Stun duration lowered to 0.75 from 1 second.
[Now gets attack speed on enemy champion hit]**
(Thoughts:) The mana cost increase will stink early, but after sheen will be less felt. Less "spam E" escapes in the early game is probably a good thing. Stun duration lowered by .25 seconds? That one might actually hurt, depending on the target. But only in the retaliation sense. She has her ult to make sure people can't escape, and with E max you can still chase forEVER. It might hurt her dueling though. The change for the attack speed buff? A good Camille generally doesn't take a fight she missed the stun on anyway unless she is ahead or just pot-committed. This change makes sense to me.
Overall, its going to be a significant nerf, but nothing that I would call gutting. :/