If we continue to explore the analogy of an organic cellular model for Arena, we should model the block on the structure of the cell. All the editable fields and functions could symbolically relate to a functioning cell (e.g. nucleus, mitochondria, chloroplast, cytoplasm) We should ask what makes a cell functioning and what makes an information unit functioning. This is why I addressed the issue of enhancing exported blocks that are often without vital elements such as title or description. Symbolically I take a 'nucleus' from you and by adding more parts it becomes a functioning cell.
Theoretically, a basic channel could serve as a neutral environment where you can keep cells organized, separated. But the greatness of arena's potential will lay in the possibility to put different cells into special environments in which they aggregate, connect and form new organism.