Phriction articles can have many headers of different depths. Nested instructions and contents are part of most use cases of Phriction. But the auto generated table of contents is a flat list. If you have three depths of headers, they all seem alike in the ToC. That is a big problem in finding the right spot in a big Phriction article. The usefulness of the ToC is decreasing fast if you have more than 10 headers with 2 or 3 different depths.
The ToC should be more structured and clearly arranged. The ToC should be automatically numbered and indented with every new header depth (like the ToC of Wikipedia).