Is the Diablo Wiki's forum outdated? Yes, yes it is. Does it need to be changed into the shiny new look that is less versatile, but easier to use? That is the important question, the one which you will decide.
It'd be helpful if I linked images of the old versus new forums, but why should I Google those when I could make you do it instead? Maybe some kind soul will do it for both of us and put them in a comment, so scroll down there and see if they did that yet.
Now finagle your little pointer down to that poll box below this sentence and cast your vote.