I mean, I came into this game looking for stealth and I found that it was really not a major part of the game, same with fallout. It honestly seems more or less the kind of stealth available in modern warfare 2. You get some stuff that helps with stealth and that's pretty much it. Not really much of a storyline with a lot of stealth missions (the dark brotherhood missions and thief guild missions don't take that long). So, the people that play rpgs really aren't looking for a specific thing and just like the whole diversity of it all? I find splinter cell, Thief, assassin's creed 2, even Deus Ex though it is an rpg has more things pertaining stealth. You can increase your stealth by increasing different things, not just upgrading stealth as a skill.
thanks