COMECOCO

Tanks are one thing, they have a max turning speed for the turret, so in effect it acts as negative acceleration if you move too fast. This is by design though, so you can't whip the turret around as fast as you want.
Transport vehicles in 3rd person are absolutely horrible for no reason though. You can't look up or down, and looking around is extremely slow (i.e. negative acceleration) and feels like moving through honey.
Nothing that can be done about this, other than Dice fixing it. 

Name: Far Cry 6
Website: https://www.ubisoft.com/en-us/game/far-cry/far-cry-6
Status: in development
Release date: October 7th 2021
Availability: pre-purchase, purchase
Stay healthy and thanks

Name: BATTLEFIELD 2042
Website: https://www.ea.com/games/battlefield
Status: In development
Release date: 22.10.2021 November 19th 2021, Early Access November 12th 2021.
Availability:  Preorder

There is no right or wrong answer to this, as it comes down to personal preference.
 
If you do 100%, this means that moving 50% of the monitor distance will be slightly different between different FOV's. If you instead do 50%, moving 100% will be slightly different, and so on.
 
Some might find it better to match 100% with hipfire, and go down as the zoom levels get higher. Say 50% on a 4x scope and 0% on snipers scopes. Higher zoom levels also means more tracking and pixelhunting in many cases, so 0% might make more sense on snipers etc.

Are you sure your FOV is 100? Because you are sending 8000 counts with your setup, which is correct for FOV 80. For FOV 100 it should be 6400 counts.

Updated; FPS does not affect sensitivity anymore, less lag all around and 3rd person aim is added!

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