Lots of developers come read the feedback for their game on this forum and we've seen countless suggestions be worked into games as a result of that feedback.
And even if they did not, our members are free to come here and post their opinions, suggestions, feedback, requests, Christmas lists, etc.
Usually you will have more of an influence over game direction if you're supporting the game. But please don't try to deter other members from posting on this thread. They have exactly as much right to be here as you do. Thanks.