This is exactly how I view Hubski. It's different enough from Reddit that it does not serve as a direct replacement. It doesn't quite have the traffic (and therefore content) that Reddit does, either. I find Hubski to be more like a full featured suite of "TrueReddits" (such as /r/TrueAskReddit, /r/TrueGaming, etc.) in that there is a major emphasis on conversation, and I really enjoy that.
I don't participate much, but that's solely because I don't often have much to say that hasn't been said. I hope that with more content, this will change. I'm here to stay, though, which is a whole lot more than I can say about other social media platforms.