If Henry Ford asked what people wanted, they would've told him they wanted faster horses.
Game designers are faced with the same problem. When you ask for feedback for your game, don't focus on what they're suggesting, focus on why they suggest it. As a game developer, you have a better understanding and power to completely redo mechanics that players would've never thought of. If you know WHY your game is interesting for players, and if you focus on WHY people are suggesting thing, it's much easier to find out what to change, who to listen to and whom to ignore.
Henry Ford did not try to make horses faster, he focused on why people want faster horses, so that they can travel faster. So he invented cars.