It's probably due to a few factors such as color correction, hdr, skybrightness. You could try setting the saturation to 1 instead of 1.1 in the colour correction xmls and see if that looks better. Otherwise there's a bunch of parameters that work together and changing one thing sometimes negatively effects something else, it's a balancing act. I'm still working on it but I'm trying to see if I can't open up the sky and cloud settings which will give me alot more freedom with how bright stuff is and when.