I think this pretty much hits the nail on the head. It's not terrible by any means.As for DNF, it does sound like it's being given unfairly poor reviews. It sounds like a thoroughly mediocre game, not an awful one. But it's hard to escape the hype surrounding it. It was never going to be the groundbreaking title 3D Realms promised for so many years. It's a victim of its own publicity, not to mention its interminable development cycle.
DNF looks and plays like a pre-Halo, original Xbox game, only in HD. In a console world with COD, Halo, Portal, Gears of War, Bulletstorm, Battlefield, and Mass Effect, among others and not even taking into account more immersive PC FPS games, that's terrible and not nearly good enough in 2011. It'd be one thing if it was released at $20 or $30, but asking $60 for this game earns it all the bad reviews it's getting.