Yeah, it brings the entire piece to life.
It would look better if it were not for the small width provided by box-arts and the logo.
I kinda like the portrait framing to it. To me (I don't know much about art), the tower-things on the left and the tree to the right are meant to frame the picture anyway. They probably could've included a little more of the background with more space, but I think I like the amount of positive space vs negative space.