Sorry about that, I have not heard of the mouse stutter issue yet, although I know that the mouse movement may be slow. You can change the mouse speed in acsetup.cfg in the "Data" folder. The mouse stutter seems to be something within the AGS engine. If the AGS engine developers add a fix for the stutter, I'll try to get a new build of Neofeud with the fix up.
Thanks for trying Neofeud though!