With the current collections capability, it looks like collections don’t have any organization within them. If you wanted to organize things into “folders” within your projects you’d have to title collections all at the top level with a naming that implied a hierarchy in order to map shared items into groupings one layer of organization down. Something like:
I would have preferred to build an arbitrary folder tree and place shared items into specific places in my folder hierarchy.
Obviously it would be more useful if this organization was available in Box Drive too.