I like the shot, it is a very sunny and pleasant scene to look at, it is also from my area of the world (sort of) and I like the bright yet pastel tones.
I know I will upset the crop cops here, but I have taken the liberty of cropping your square format to what I think is a more satisfying image (to me at least). I really like the sky and the foreground rocks etc, but the far distant islands feel too thin in the shot and need to be brought forward into the scene a little, I feel that cropping into the shot in this way seems to do this, albeit only slightly, but none the less makes the distant islands more of a feature of the shot I think.
A nice sunny day on the islands and highlands, does it get any better? I don't think so