Personally, I think this is a horrible move. The official class forums were bad enough, and now they've thrust all of the classes together. Have you seen those really cruel, gross videos where they put two scary looking bugs together in a glass cage and let them kill each other, and they'll do it every single time just because it's in their nature to defend themselves? This is the WoW forum equivalent of it. This is going to be a disaster. The walls are going to be painted with blood.
On the other hand, this might turn out to be a good thing in that you're going to see a lot more community-made class forums such as ShadowPriest.com and Maintankadin cropping up. Places like that are generally far more useful in my experience, but come on. Does removing the class forums really sound like a good idea? It's just spreading the venom around instead of trying to find an antivenom. I could understand this if they added these three forums in addition to the class forums, but in place of them? Yeesh.
We're really interested in what all of you think about this as well, so we've made a handy dandy poll. Do you think they should have kept the role forums? Do you like the switch to role forums? Do you think they should have both?
EDIT: Blizzard poster Tyren later said they're not adverse to keeping the class forums, and may do so all depending on the feedback they receive. So we'll see what actually ends up happening, but I have a feeling class forums aren't going anywhere.
EDIT 2: Blizzard has taken only a few hours to decide to they will be keeping the class forums as well as the role forums. Crisis averted. Put down you dot shockers and step away slowly.