After watching my nephew play on my console and getting 40+ kills every game i decided to try the higher sensitivity, I have been slowly increasing, one number at a time, over the past 2 weeks. Started out on 4 and now I am up to 10. Taking it slow has given me the chance to adapt. I can for sure say that my K/D is rising and I am loosing less gun fights. I also am not getting shot in the back as often because I can spin around and have enough time to react.
The other thing that has made a HUGE difference is the tactical button layout, I used to loose alot of gun fights due to the Panic knife, now I am a drop shooting maniac. Still tring to get my hands to push the O button to knife when I want to, but I quite knifing on accident.