I believe the additional FN keys and notification functionality came from the Asus Live Update. I had issues trying to swap the synaptics drivers earlier and it uninstalled the Asus drivers. So this time I created a restore point and also backed up the syn* folders from DriverStore which I assume are the Asus synaptics drivers. The folders are here for people to try before going the system refresh route. The new drivers seem to be good for me compared to the version I tried off the synaptics site. There are options you can tweak in the mouse properties that may get it behaving the way you want.