These features are all sage advice for any blog in my opinion, and this blog is a good example of one that is easy to follow as a result.
Regarding the Table of Contents feature, however, I believe this makes a big difference in larger blogs, but for medium sized or smaller blogs, it can be a distractor. I use Hugo as well for compositing my site, and find that using ample first level headings (e.g., # Heading name) for major components alongside a solid flow that contains visual graphics placed shortly after the heading offers an attractive and easy-to-navigate browsing experience.
Regarding the Table of Contents feature, however, I believe this makes a big difference in larger blogs, but for medium sized or smaller blogs, it can be a distractor. I use Hugo as well for compositing my site, and find that using ample first level headings (e.g., # Heading name) for major components alongside a solid flow that contains visual graphics placed shortly after the heading offers an attractive and easy-to-navigate browsing experience.