The suggestions forum is already there. The idea is for a designated feedback forum for existing content. >_>
It's primarily to centralize feedback, though, however ignored it may be. A fair chunk of feedback is spread out among subforums and in the wrong places altogether, or hidden by suggestion topics and the like. Worst case scenario, it becomes a de facto complaints forum (which still keeps the rest of the forums a little cleaner), best case scenario the higher density of designated feedback actually prompts attention.