I looked at this earlier and wasn't sure about it. It's well executed and the photograph has all the technical considerations ironed out. The composition is traditional, and maybe that's where I lost interest - it's too traditional given the limited content. It's lovely of course at first glance, but I found my eyes were hunting for something after the tree. What's next? What is going to create some drama, tension, or interest with the tree? By itself, the tree is not exceptional. With the fog it's a bit moodier but that doesn't provide enough to carry the picture for me.
I think it is then very pretty but not provocative enough. Consider for instance had there been a figure of some sort to the right - human or animal. A cross or gravestone under the tree. Something to emphasize distance, size, shape. Something to get the eye more around the picture. With just the tree, maybe the traditional composition doesn't help. Lovely in many respects, but not fascinating.