Got a reply in steam discussions with an answer - Devs, please make this an option in the menu. Thank you for the game!
steamcommunity dot com/app/760060/discussions/0/1744480332711653591
Originally posted by janne404:
From C:\Users*your username*\AppData\Local\ZoneUE4\Saved\Config\WindowsNoEditor
Edit the Input.ini and add:
[/script/engine.inputsettings]
bEnableMouseSmoothing=false
You can also modify the mouse/camera sensitivity if you need:
steamcommunity dot com/app/760060/discussions/0/1744479063994749079/