I'm totally, 100% down with this game, just a disclaimer.
I don't know why so many people seem determined to hate on this game. I get things like the enemies seeming too monochrome, or Hell looking too yellow (though I think the alternatives posted in this thread are actually worse), or the general fear that accompanies each new Doom release. What I don't understand is things like an introductory map or gameplay that was clearly meant to be cinematic being pulled apart in search of any potential flaw, and then carrying that criticism into the game and the studio as a whole. Even things like the cyberdemon yelling in the player's face seemed like it was merely a scripted moment to drum up hype, to me. Why does that show that they don't care?
For me the biggest issue is that people are claiming there is no appeal to the fans of classic Doom in what has been shown, and that this looks the same as any other FPS out there. Even considering the design changes, the double jump and things like the weapon wheel I have to ask, what? What AAA game looks and plays like this in 2015? Even if you can't give them 100% credit I think it's pretty clear that they've gotten a lot closer to the old-school FPS design than almost every other recent shooter, especially if your consider the route that Quake 4 and Doom 3 went.
Obviously there are huge differences between this game and the classic ones, and some of those choices might not end up amounting to a superior experience, but I think it's pretty clear that they're trying to find a compromise between classic FPS design and modern sensibilities. For me the hope isn't that they bump the speed up or remove the fatalities (though the super shotgun should definitely be a lot more powerful upon release, that's a given) but that the gameplay loop they craft is fun, and feels somewhat familiar.