Figured I would make a quick explanation for those that dont know how to configure these settings.
Ideally you want to be at 0%, but that can potentially cause issues for some controllers. So loadup a private game for testing purposes and I will explain the process for how to set them.
How to set your inner deadzone:
Put it at 0%
Now, lightly nudge your right stick in a direction then let go. If your camera is still slowly moving even when you arent touching the stick (this is called look drift), then you should increase the size of your deadzone. Do this for every direction, including the diagonals.
If you have no drift problems, then congratulations… you are done.
However if you have drift problem, increase the size of the deadzone then try again. Repeat the process until you find the lowest number possible, where you dont get look drift.
How to set your outer deadzone:
Again, put this number to 0%
This time spin your character left, then spin your character right. If your character is turning very slowly in one or both directions then similar to before, increase the size of the deadzone, and try again.
Thats it!
Shouldnt take more than a couple minutes. And should give you improved control over your aim. Aim acceleration is primarily a preference thing, so you are on your own to figure out what setting suits you best.
EDIT - Over aiming concerns
Gonna address these in the original post since multiple people have mentioned this.
There is a good chance you might find yourself over aiming at first. With your inner deadzone set to 0 that means as soon as the stick moves, the game will register that movement, whereas previously the first 12% of stick movement wasnt being registered by the game at all. This means your aim is going to move a little farther than what you are used to every time you adjust it.
A larger range of control is objectively better, but if you are very used to the old settings it will require an adjustment period for your muscle memory to adapt. You can try lowering the sensitivity a bit in the meantime, but ultimately you will probably need some time to adapt to the fact that a portion of the stick movement that used to do nothing, is now doing something. Once you get used to new settings however, you should find you have a greater level of control over your aiming than you previously did.