If it were me, I would try to tone down the bright blues in the sky and soften the clouds a little. I do the same thing as you and my paintings are always a little too blue and it takes away from the realism. The cliffs and water are very nice. I also noticed that the clouds keep there distance from the cliffs as if there's some kind of force field
Let them touch and go behind your cliffs.
These are just my opinions and I'm just a beginner. Where's the grain of salt emoticon?