The Iyagi dialogs at Talk to Me in Korean.com are better than anything on this site, by a long shot. Natural dialogs completely in Korean, that go over fun topics.
If this site wants to avoid slipping into irrelevance, they need to add material of that level of quality. Right now, the introductory lessons are full of English and so concerned with everyone laughing and being friendly that the amount of Korean actually being taught is pretty minimal. And the advanced blogs are, with a few exceptions, repetitive and boring.
They need to add better material fast - let's face it; announcing a new series and having it completed in 6 months is lame.