What I want Feedly to work in this use case is not some greenhouse approach to exploring related feeds, but some easier way to integrate with organic discovery of content. Having a whole page that does this seems at best archaic, by 2016 standards. Most of us use social network or otherwise organically explore the web as we find new content. Feedly would do better to focus on exploration when we add new feeds to our subscriptions rather than having us to drive a search tool.
As an anecdote, I only use the new content page when I want Feedly to parse an obtuse website so it can find the relevant feed URL for me.