I think that problem is solved by something like Feedly. There's no integration of comments, but is a somewhat personally curated source of blogs, regardless of hosting platform.
the ability to interact with others in the content from a feed reader (a feed 'client', not just reader, may be what I'm talking about) is what's missing.
the ability to interact with others in the content from a feed reader (a feed 'client', not just reader, may be what I'm talking about) is what's missing.