Malibu is breathtaking.
One of the things I've recently learned with Landscape photography is figuring out what one is trying to showcase . Is it the shoreline, the interesting cloud formations, the hills or a combination thereof?
By looking at the image, I see that there is a very prominent foreground. Also, the top left corner of the photo might allow for some zooming in (I'm not a big fan of cropping postprod if I can avoid it), and thus focus on the curving shore. (This issue has been one of the main reasons my landscapes have been more abstract, and less appealing)
So in short, I would have placed my camera a bit more to the left (actually as much as possible) and then a bit higher, then let the trees nearby and any brush become the foreground, and then keep as much of the shore arc as visible as possible.
Lastly, since this is the image you do have, I wonder what improvements could come from cropping a bit from the bottom left about 15-20%, and then working on the hills, so that they're less blue, and more of their original color (that brownish green). That might do enough to direct the eye due to contrast.
My two cents. 
PS: I Like the attempt to blur the background, though it came at the cost of overall sharpness to the rest of the image.