Thanks for the tip, JohnW. Most of the time, except for the really special cases, configuring a user's video card thru PCC is effortless and uneventful. What I miss most, which KDE dropped is Xinerama on Twinview. I miss the days when a single wallpaper would be across two monitors giving one a feeling that the two are somehow connected as one.
Nowadays is not so bad either, and it is quite understandable that trade offs had to be made.