You are absolutely right, that is a big problem and I really can't understand why KDE Plasma and Gnome devs haven't created a better trackpad setup utility. Guess: They don't know the convenience of the OS X driver since they don't use (even have) OS X. But Touchegg is far more than your Windows touchpad driver support. The Magic Trackpad works excellent with all its (firmware based) touch detection with just the standard synaptics driver, if you want gestures you have to use Touchegg or a similar tool. (Other problem: touchegg seems to consume constantly 1% CPU on my Phenom II X6 1100T, don't know if this is much but it comes from the userland architecture with constant driver polling.)
Re: Touchpad support
But Touchegg is far more than your Windows touchpad driver support. The Magic Trackpad works excellent with all its (firmware based) touch detection with just the standard synaptics driver, if you want gestures you have to use Touchegg or a similar tool. (Other problem: touchegg seems to consume constantly 1% CPU on my Phenom II X6 1100T, don't know if this is much but it comes from the userland architecture with constant driver polling.)