The clouds in perfect weather look a bit patchy to my eye. Here's a screenshot. The original pic on the right. The one on the left is photoshopped by me. The sky is painted with very light transparent yellow. This changes the colour of the sky to somewhat grey but it does make the patchiness a little more subtle.
Anyways I think that making the clouds a little more transparent would make them look better - in good weather. However more transparency might mean worse looking foggy clouds
