The requirement to have sections be uniquely named is a tad annoying when it comes to document setups in which folders outline specific topics, but each folder has a similar structure in sections.
E.g.: a document where all folders represent products and each require a description, competition and features section. Currently, the unique section name would force all sections to be pre or post-fixed by the folder name.
The search UX could be handled by displaying the folder the section is in along with the name.