The problem with a weak center of interest

This image has a variety of lines and shapes. The tall stems, buds and partially folded leaves make a nice bed of interesting shapes in which to showcase the white lilies. In other words, there is good structural content which is essential for a good photo.

The weakness is in the center of interest - the group of three lilies. They are not compelling enough to overpower the other content. The content surrounding the lilies is actually more interesting than the lilies, making them seem unimportant. When we have a definite center of interest, it should be visually powerful.