Touch on linux has always been a pet peeve of mine (I was the first to publish two-finger right click patches[1] for the synaptics driver http://wikigentoo.ksiezyc.pl/Synaptics_Touchpad.htm ). I've long thought about fixing the current drivers, but I can't prioritize the time myself. I'll donate some cash.

Luckily, this should be relatively simple. Anyone who wants to make this should be looking at the Chromium touchpad code (runs linux, and my Pixelbook touchpad is as good as a macbook touchpad. For example, the touch input filter: https://chromium.googlesource.com/chromiumos/platform/touch_... )

I think you'd get most of the quality with a kalman filter (A really cool filter that takes unstable input, and corrects it based on probabilities to give very high quality output).

[1] http://douglas.mayle.org/files/synaptics-two-finger-click.di...