It's important to remember here that Skyrim is less than a year away from its scheduled release date, so that's going to limit the changes Bethesda can make to the final product. So there's a lot of ideas that, even if Bethesda might have considered them worthy if they were suggested at the start of the game's development cycle, would simply not be feasible to do now.
And just because an idea doesn't get put into the game doesn't mean the developers are ignoring their fanbase. Just because a select group of fans want something doesn't mean it would be a good idea to put it in the game, maybe said idea wouldn't go well with the majority of players, or just wouldn't fit in with the overall direction the developers are going in. And developers need to take these things into account. While from the perspective of a fan, it feels nice to know the developers care about what the fanbase thinks, if Bethesda were to add everything that their fans wanted, Skyrim would become an incoherent mess that no one likes, and that's if it doesn't fall into development hell due to Bethesda needing to constantly change things to satisfy the endless demands of the fanbase. While you'll often hear people say developers should listen to their fans, and I won't disagree with that, that just means they should hear what their fanbase wants, it doesn't mean they should always try to cater to those demands. Sometimes, developers just have to decide that this is what they're going to do, even if maybe some fans have other ideas.
That isn't to say we shouldn't post what we want to see in the game here, of course, after all, the point of these forums is to discuss Skyrim, this includes what we want or don't want from the game. It just means we shouldn't assume that just because we ask for something here means we'll get it, and that if we don't, then Bethesda doesn't care about their fans.
Playable Argonian and Khajiit in Morrowind is the big exception here.
And I'm glad that Bethesda decided to listen to their fans in that respect. Morrowind was the game that introduced me to the Elder Scrolls and therefore, I would certainly have played it if Bethesda had not done so (Being as I wouldn't have known that we were able to play as them in past games.) but I probably wouldn't look on the series the same way I do now had it not been for that.
Oblivion level scaling did not require fan response to fix
On the other hand the complain that Morrowind and Fallout 3 was to easy at high level was probably mostly from fans and other power gamers, fallout 3 would be far harder without the unique weapons.
To me many of the expansions to Fallout 3 looked like a huge fan service.
The pit, get all the .44 and sniper rifle ammo you need.
Broken steel, continue after endgame, higher level cap and high level content.
Pont Lookout, two perks who made it easier to kill the broken steel enemies
Mothership zeta. A lot of epoxy (repair hammers)
That does seem to be true about the Fallout 3 DLC, when you think about it. And I think Oblivion's level scaling was probably an answer to the complaint's of Morrowind's lack of challenge at high levels, and the problems with that do go to show that just because you try to adress you're fans' complaints doesn't mean the results will be better.