Of course they listen! If they didn't read all this stuff, or at least a summary, M'aiq wouldn't have so much to say.

They're not in the habit of making major gameplay changes after a release. They will make what they want for DLC and patch some bugs, and that's about it.
The other thing to keep in mind is most people don't come on forums and complain, even when they don't like the product. If they like what they're doing and most users don't complain, they won't feel compelled to change it. Certain users also get more say: the mod team who create an awesome mod that improves the game is more likely to be noticed than any of our posts, no matter how well we articulate our points. Then there are other industry people who might raise the same issues and are more likely to be heard. Or maybe they'll raise different issues and those ones will be the influencial ones.