... I would prefer to see slightly less of the top of the photograph and slightly more of the bottom. This would balance the space above the top right hilltop with the space below the bright for(ground) in the bottom left.
In a sense, the picture is also balanced just as it is: the fog line in the foreground, lying roughly on a third's line, is echoed by the fog in the background also lying on a third's line. The middleground trees and filtered sunlight is “trapped” between the two. This also makes for a pleasing composition.