While we conducted the exercise using my suggested organization, I was not happy unable to simultaneously identify topics that overlapped as both collaborative/projects and independent/independent. I suggested that we consider alternative methods to visually identify natural groupings. The group suggested several alternatives, and Roger asked the group to investigate alternative organizations.
I like doing research. I don't mind sorting through 75 abstracts to find 2-4 papers that are tacitly related to the perceived topic area. In the end, I found two experimental papers loosely related to what I was looking for. Each paper contained examples of different SBB organizational structures, including one that Chance had suggested!