Sensitivity needs to be increased. what is considered 100% in this is not high enough. Could increase it by a third, maybe even half.
I also don't know why you have reduced sensitivity on 45 degree angles. I can move left and right as quick as 100 will allow, up and down the same but diagonally and it's half speed. It's almost like your reading rotational stick movement on a square graph with no adjustments or considerations made for the difference.
There needs to be alternate sensitivity curves available for players to choose from, or at the very least, the curve needs to be much more linear or the curve increase much farther from max input. It takes about 80-90% of stick input for moderate speed aim. anything below that is way too slow, which exacerbates the diagonal movement too and minimal input, possibly 30% or less stick input, feels almost like a massive deadzone despite deadzone being set to none.
To an extent, these issues make navigating with the cursor to be moderately inaccurate as well but under no pressure, I can manage. Can't say how well i'd do if i had to change something quickly in a fight.
Of all the shooters ubisoft has made, third, first or otherwise, i have never found one with decent sensitivity options. I think the closest I've gotten to reasonable was rainbow six siege but even that game, i still fight with the controls to an extent.
You can tweak left and right sensitivity, up and down sensitivity but it doesn't effect diagonal sensitivity
Acceleration doesn't increase max sensitivity, it increases the curve which as i said, is already right too curved at the higher end
changing sensitivity specifically for 1st and 3rd person doesn't increase the maxmium sensitivity. Fine, it's better than the previous beta.
Nothing you've said disproves my points. I'm trying to play it right this moment and it's a struggle