Some compromise between ARMA 2 and current ARMA 3 is necessary.
The limited turn speed in ARMA, along with smooth aiming deadzone. Slow, to fast with more movement, made a realistic and immersive experience.
ARMA 3 has no such smoothness and everything feels too fast and floaty. It's hard to get small precise movements with aiming deadzone. Not a problem in ARMA 2.
Very important especially for TrackIR users that use deadzone as it is a very good mechanic to use in conjuction.
I am finding it is just extremely jerky and awkward to use in ARMA 3.
In addition, the third person view in ground vehicles is too floaty when using Track IR or freelook