The sky, the tree, and the green view around really are lovely. The contrast between it all makes a lovely shot and I can understand why you would want to take such a nice pic.
Overexposed means too much light, like the white parts of the sky which show little details. But it is a small defect, considering the beauty of the landscape, the wonderful colors and that lone tree. It has a lot of poetic atmosphere. :)
It's too bad people don't ever stop to think that maybe that's the way the picture's meant to be. Not every picture is gonna be the same. And they don't all have to show every little detail if that's not the way the artist intended it.