Bright light moods are too rare in the game. Also there isn't any race starting in the morning. What about adding a late morning setup with clear sky, slightly colder tones and just different shadows orientations ? That would be welcome.
Another thing is the sky texture during rain, especially in NZ. It's way too detailed : most of the time the sky under heavy rain just looks grey, with no real directional lighting. A change on this would be nice.