UPDATE I found a solution that worked for me via a lot of trial and error:
Set in-game mouse sensitivity for Look and aim to 0.
Increase you mouse DPI to compensate.
Removed almost all stutter for me.
This will make your mouse too fast in the menus and in Windows itself, so you will need a mouse that has an on the fly dpi switch to switch to a lower DPI for when you enter menus or exit the game.
Any improvements / fixes to the DX12 support since the latest patch ?
I haven't dared try it myself, ha.
I'm still getting horrific mouse stutter on DX11 though. Finally resigned to the fact this will be a gamepad game for me, but I'm still holding a little hope in reserve...
Anyone else getting the mouse stutter? It's highlighted in this footage I took:
I've tried:
Mouse Smoothing - gets rid of it, but the input lag is too much.
All the CPU 100% fixes even though my CPU is never maxed.
Changing all settings, DX11 + 12, 3 different drivers, etc...
No other game has this issue.
If anyone has any suggestions please share!