The current way the suggestions forums is sorted is really annoying. Some of the ideas that everybody has shown support for and wanted in the game have dropped into the background because there's nothing left to say, whereas some ideas receive negative opinions but remain in the top pages because people are complaining (I can understand a certain person may think I am referring to them because I disliked their idea - I am not. I am referring to ideas in which the community on a whole has disliked).
My suggestion is that there actually be a +1 button. Of course the +1 button wouldn't really sort much on it's own, so the other part to this is that there is a "Sort by rating" sort mode for the forums. I would also like to say I support a -1 button (because then sorting by result wouldn't just bring up the oldest nice idea).