Hi Keith, other devs,
I’ve been working a lot with Compiling a large and complex document recently, and have been having some headaches with it, and the headaches all boil down to one missing feature: The ability to specify the formatting for folders, documents, and subdocuments depending not only their position in the hierarchy, but also what type of object precedes them. For instance – if a document with subdocuments comes after, say, a folder, it should have one title prefix and suffix and should begin with a page break; if it comes after, say, a regular document, it should have another title format, and should be separated by a single return. I know this sounds odd – but to do what I want in a way that Scrivener will understand would, in my case, require creating some unnecessarily complex level structures to compensate for the lack of this. Since I can also envision other situations where functionality like this might come in handy, and since it seems a fairly natural (if a bit of an obscure) consequence of the freedom Scrivener allows when creating document structures, it seems like the natural sort of thing that you might want to think about including in later iterations of the software. I think it’s a fine-tuning-type of tool that writers with complicated structural needs, like me, would really appreciate having! 
–Andy
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