Lots of people are asking for dropdown menus. I personnally think that doing so would add complexity and would not satisfy everyone’s needs. Ghost simplicity is one of its best caracteristics and we’ve seen more and more elements of it getting the functionnality of tags / labels. I think that it’s a quite simple, light and easy way to go. It would be also much easier to add such a functionnality than building a new navigation manager. And it’s way more flexible for theme creation. Labels for navigation would allow anybody to create his own subnavigation with as many levels as needed.