The over exposure of the sky area gives an unnatural cast to this which could be from attempting to correct it.
When you plan to include 60 to 75 % sky the exposure should be based on that area. You can usually recover all or much of the shadow/dark areas , but rarely can you do anything with blown highlights.
The picture could use more foreground space. At least enough to show a base area for the main subject tree.
In fact, with today's cameras it's always better to step back a foot or so after you've composed your photograph and expose a slightly larger image. It's much simpler to crop a bit off than to have to create/clone something form nothing to correct the composition or straighten a horizon line, where you will be forced to crop even more.
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