Critical posts are fine. What I get fed up with is the same folk making the same whiny posts time after time. But constructive points about how to make the forum better will always be welcomed. As for the name, it's what everyone always called the forum anyway. If there's no topic that interests you, why not create some of your own?
I do think there may be a general downturn with hifi forums anyway.Unless you have a lot of new people coming in, then there will be a natural drift of some due to other hobbies, commitments etc. For many people, they may well be done with upgrading etc, and are bored of reading about new kit/foo/upgrades. Unless they were interested in the other sections, they will visit less, or not at all. So there needs to be more variety in the other sections of the site.