Winny, that shot of the spit looks great! to me, the landscape colours look perfect. However, as you say, it isn't an exact science. Looking at the 109 shot, you have altered the colours of the paintscheme quite dramatically. Although it's way too early to comment, i think that changes like this aren't always going to work. they affect the whole game, and thus can make one area look good, and another look worse. Similarly, the paintscheme of the Spit has been altered, and to me doesn't reflect the colours which I like. Still a great job though. We'll see how it is in a few weeks time.
In the perfect world, we'd be able to adjust the colour/saturation of the lansdscape, sky etc to suit our liking, but of course that is a lot to ask!
I'm sure there's a happy medium for everyone, I did the 109 and Spit shots quickly and differently to each other. Just sliding sliders around.