I rather like the way the artist used the space to his or her best advantage:
In contrast to Display XI, I think this composition uses the size of the space and the scale of the elements well. Although there are an even number of elements, I think the artist has found a tenable solution. The scale of the bonsai and kusamono work well with the size of the tokonoma. The contrasting foliage also works well. There is enough void space and the composition doesn't seem cluttered.
I'm trying to imagine trying to fit a scroll in the tokonoma: I'm not sure if the current arrangement would work with a scroll. If the scroll were placed on the left-hand side, the artist would have to be careful about the vertical alignment and the kusamono. I'm no expert at traditional displays, but I think the right triangle created by the placement of a wall hanging might be something to avoid. It might be possible to use some other kind of wall decoration (a small fan perhaps), something that didn't have vertical lines that would place emphasize the left-half of the composition. Even then, I still have my doubts about using any kind of wall hanging with the current elements in this particular tokonoma.
I think if the artist were able to develop perspective by placing one of the elements in the foreground and putting the other in the middleground, it might make use of the depth of the display better since there isn't a scroll or wall hanging in the background. Perhaps this isn't the ideal solution, but I think the artist's arrived at an acceptable compromise given the size of the space and the choice and scale of the two elements.
P