The number of entities may be one useful proxy for the level of complexity in an organization, but the combined length of all the contracts determining the mutual obligations between these entities surely is another.
At the end of the day, one of the key qualities of the legal profession is to make complexity more manageable by providing market participants with clear, unambiguous and concise contracts rather than the opaque, heavily cross referenced and nearly inaccessible piles of paper that one too often encounters in practice. Here, as always, more is less, less is more.