So this is two fold: The first suggestion I wanted to make was that games tell you when you have already left a rating. I noticed this when I was rating a game, about to click submit and then thought "wait... have i done this one already?" Turns out I had!
The second suggestion is having a specific forum for making these suggestions! (Or adding a flair for them!!) So they can be sorted more easily and not distract other people in the forums.