I've just thought about posting a feature request, but luckily I found this existing topic.

A consumption of all forums would be really great. You must know: I like the new way having a lot of specialized forums pointing to the right persons in charge. They are even the first point of reference, even before documentation or issue tracker

But in the good old days of forums.asp.net all knowledge and trouble focused to one forum. It was easy to find which topics are hot and how the community feels and lives.