They nerfed so much of her kit that I don't think that's going to break her. I like the buff because it gives her dueling power back a little. I can't tell you how many times I will be about 2 kills ahead yet I can't kill the other laner without my jungler because she is weak. I don't believe that is right. It has forced the champ into a farm and roam mid playstyle which most meta top laners don't do because they split and duel but Camille is weak at dueling now. If you try to fight most of the top laners you will get beat hard early and mid. Late you win unless against fiora, Jax, yi, etc. Here are the nerfs since she was released op.
7.1
Base Stats
HEALTH GROWTH STAT: 95 ⇒ 85
Passive - Adaptive Defenses
SHIELD DURATION: 1.5/2.0/2.5 seconds ⇒ 1.5 seconds
E - Hookshot
NOT A NINJA: Slightly increased radius where Camille will reveal herself if Hookshotting near enemies while she is in FoW
R - The Hextech Ultimatum
KNOCKAWAY SPEED: 600 ⇒ 1000
GET UP: Knockaway stun now only lasts until the target lands, rather than a 1-second fixed duration
7.3
Q - Precision Protocol
EMPOWERED CAST BONUS DAMAGE: 100% ⇒ 80%
W - Tactical Sweep
OUTER SWEEP SLOW DECAY: Now decays fully to 0% over the duration
SLOW: 90% ⇒ 80%
E - Hookshot
COST: 50 mana ⇒ 70 mana
STUN DURATION: 1 second ⇒ 0.75 seconds
NEW ATTACK SPEED: Now only granted if Camille hits an enemy champion
R - The Hextech Ultimatum
AFTER DEATH DURATION: No longer persists for its full remaining duration after Camille dies. Now dissipates within 1 second after Camille dies.
7.7
W - Tactical Sweep
REMOVED NON-CHAMPION HEAL: Camille no longer heals for up to 10% of her maximum health when Tactical Sweep's outer half damages minions or monsters
R - The Hextech Ultimatum
DURATION: 4 seconds at all ranks ⇒ 2.5/3.25/4 seconds
An analysis shows sustain was dramatically decreased, her ult power was stripped quite a bit (1.5 seconds is a lot and could be two more autos of current health when dueling), slow decreased and decays now, tower taking ability decreased with e nerf and if you miss e you will lose trade due to no damage, stun, and as buff.
And so returning the q damage would not make her broken. She needs some type of buff. To compete with the meta top laners.