That last picture looks brilliant!
But I think that, in the textures themselves, there are too many really dark fields, and also too many really light fields (like the yellow/rape one, which is rather unhistorical)
Not your fault though, Ali! Indeed, I think that overall, the fields are too dark for Summer. In CloD, the textures seem too washed out...maybe a correct colour balance can be achieved, where the fields are fairly light in colour, and the trees are contrastingly dark?
And, has been said numerous times now, dark hedge-borders for the fields would be lovely. But all in good time.
Interestingly, when I had time to fly Il-2, I used to use a program called powerstrip, which allows one to calibrate their monitor to represent colour temperatures, to simulate 'true' day-time colours. I use settings that Avala posted, and it makes Il-2 look wonderful.