@afrantzis Okay, I'll try to do this.
@rbernon I lied a little in the text to MR. This is not entirely raw input, it is input with sensitivity = 1.0, or zero point in libinput curve, libinput adds profile influence to this input, but with a flat profile we will have behavior and sensitivity identical to Windows with acceleration disabled, thereby easily transferring settings games. This input leaves the profile, but resets the sensitivity, i.e. we can avoid double input conversion.