They do mean something, but a suggestion is just that. An idea put forth for consideration. Does not mean there's an obligation to do it. In reality many of the suggestions given don't seem useful. Much of it just has to do with a persons personal interests (rooms for 'x' subject).
Also, Robo is in the process of rebuilding the forums and chats. He may be taking more suggestions than you see and implementing them in the new version, rather than adding to the current system.