After trying Blinkfeed, I see the best way to utilize it personally is to select only one topic. You only get all the feeds for that topic. If you select multiple topics it is not segregated like Flipboard, each in their respective tap so to speak for the latter app.
Maybe I'm not setting it up correctly? Is that the way it is, you get multiple feeds for each topic you selected as they come in and there is no segregation like Flipboard?
That's the way it's working for me at least. There may be a better way to set it up. I have Engadget, ESPN, and AP feeding into mine. Facebook and Twitter are to often checked for me to utilize that feature. Plus it just pulls random post, half of which I would never read anyways.