I have small hands and the tap-2-click was killing me, as I am always typing commands on the servers I support remotely. I heard the same answer from Asus and Synaptic, "stick with the manufacturer's driver"
If the driver is impacting the functionality of something so essential as typing or simply utilizing the laptop, then there is a problem.
Here's the fix- If available, download the Elan version of the driver from the manufacturer. Many, like Asus, utilize two different manufacturer's touchpads that are essentially the same, so the other driver may have the feature options the first driver did not.
For me, I went to Asus support site, downloaded the Elan version after many other's failed, (such as Vista drivers in compatibility mode, etc..) and I was very satisfied with the Elan drivers for my U46e Asus laptop that allowed me to control the touchpad tap-2-click, scrolling, etc.