Can KDE do something about touchpad support whist the underlying X and kernel support for the hardware is absolute rubbish? It was a while ago I used KDE, but from what I can remember there was no option to fine tune touchpad behaviour.
I like that under Linux you have a freedom of choice when it comes to window managers. KDE, Gnome2-3, XFCE, Cinnamon, you name it. It's awesome to have so many tools for one problem.
Hell, I even liked Unity. I think it was a very clean and easy to use wmanager.
But no matter how fancy-ass the wrapping is, if the problem is underneath it.