"So, for everyone feeling mouse input latency, smoothing or artifacts, please do the following:
Go into your config file in C(or your drive):\Users%USERNAME%\AppData\Local\LEAP\Saved\Config\WindowsNoEditor
Look for a file called "Input.ini"

Add the line bEnableMouseSmoothing=False at the end (if yours already has a bEnableMouseSmoothing in there, set it to false).
"
try bEnableFOVScaling=False too