I'd like to have more space on each side.
Now I find this picture as a very tight so I believe that even one or two steps back would do the job in this case.
It will have also a positive impact on the first impression that this photo makes. Now it is very hard to chose the most dominating part, weather it is background or the trees.
I think that making same composition in square (with addition of more space on the left, and much more on the ground and a little bit at the top) would be also beneficial for this photo.
BTW the view behind the trees is so picturesque that You would utilize it for brand new composition.