Polls would be good for feedback on how the updates and new contents are received, but as far as telling the devs what to do with the game is a terrible idea. Ever try cooking with three people at the same stove? Doesn't turn out well. To continue the food analogy, the devs are the cooks, we are the customers, and we should be telling them if the food is too bland, too salty, too greasy, or just plain vomit inducing instead of telling them they need to add more parsley to the food.