Raj, whenever you shoot directly into the sun, the flare kills contrast in your image and you really need to push that back in. I find you really need that on the trees with this shot.
The other thought is that the sky really lacks tonality, so I wonder if pushing a gradient into the image to give the sky some variation might be appropriate as well.
You might want to look at cleaning your sensor, as both of these things really bring out the dust spots on it (which I removed in this edit).
(with gradient + contrast)
(with contrast increase only)