I like structuring my paragraphs by what they represent semantically, like thesis, argument, example, idea etc.
Right now, it’s only possible to label entire files that contain multiple paragraphs. And, frankly, I don’t think it’s economically viable to create a file for every single paragraph (which can be as short as one sentence).
A possible solution would be: Assigning a (colored) label (or what-have-you) to a selected part of text, so like highlighting, but searchable. That would help me (and maybe many others, too?) a lot. That’s the single most important feature I wish Scrivener had.