Although it took some getting used to, I think its a completely valid format. From what I can tell, they're attempting to make the forum an easily searchable hub of branching discussion that focuses on the community as a whole (good and bad), instead of sticking with the segmented or segregated individualistic communities that existed in the old B.net days (Forum Y hated Forum X, Forum Z hated Forum X and Y, and The Flood hated everyone). Of course, this may all change once they start introducing and expounding upon the different factions to be featured in Destiny. Perhaps then we'll start to see some of that good ol' antagonism return! The only feature I was sad to see go really was the member ranking system... it allowed you to scan a topic quickly to find (for the most part) the more interesting voices in the community.