I've been a loyal member for five years, and I've never seen such a huge slowdown in traffic on the forums as I have since the new site. Some 'new' posts take a few hours to respond to, as opposed to a few minutes on the old site. Members are taking off.
If there's any possible way to get the old site back, do it now. Suck up your pride and do it. The majority here really dislikes the forum changes and the layout/design in totality. It sucks. Let it go.
There are some fundamental changes to the design that are just plain ugly. The organization of content gives me a headache to navigate through. The front page sucks, and really it just looks like you're trying to push the faces of your REVIEWERS than the actual games. There's a huge difference, and lack, of functionality on this new site.
New isn't always better. If I don't see changes soon, I'll just pick up and move to another site. It's just frustrating because when people saw the pictures of the changes on the old forums, there was an OVERWHELMING negative reaction to them. If the gamespot team was listening at ALL, they would have KNOWN we wouldn't like these changes.
In a single update this site has gone from my #1 page for gaming news, to my least favourite gaming site to visit.
There isn't much I can tell you guys in terms of constructive feedback, because you're either already aware of what needs to be implemented, or the changes I'll propose would be too major to implement.
I don't see this site going anywhere with this design, and many people still left in the community would prefer to have the old site back.