Just out of interest, what level of crop are these shots? I would like to try and do a comparison with my A200. Also, what aperture, focal length? Have you tried a comparison in Raw?
My own experience is that the A200 doesn't capture great detail in landscapes (I don't find it a great landscape camera), butthen I don't have anything previous to compare it with and have taken very few shots comparable with your example.
It has captured the feel and subtlety of valley mists in the landscape extremely well in some recent shots I took in Italy.
I haven't had any significant white balance problems in this sort of shot.