I agree wholeheartedly. I enjoy having conversations and being able to discuss topics rather than have them devolve into memes or one liners. This is something I see that Hubski excels at. However, from an outsider, and in particular a potential new user, they are going to see the front page (for lack of a better term) as scarce. This is one of the top ones up there and it only has mid-twenties for comments. In fact, it is the only one that has more than 5 comments.
I am not saying it is a bad thing that topics have smaller and more personal conversations, but I am not saying it's a good thing either. Right now I think it only attracts users that want to have a conversation, but that's about it. I guess it is a bit of the chicken and the egg scenario.