I saw the 1UP interview and Sawyer said, and I quote word for word: "This is not the true Iron Sights we're putting in the final game"
In that case, it probably means when it's finished, it will probably changed, it certainly seems pretty pointless to incorporate iron sights into the game if you're still not actually going to aim with them, and I find it unlikely that we'd get that.
As to the blood and gore, regretably, from what I've seen so far, it looks like it hasn't been improved at all, and while I suppose it could change at some time during development, I think that we can safely assume that, unless we hear information to the contrary, we can assume that what we've seen so far will be more or less what we can expect.
Honestly, Fallout 3's gore could have done with some improvements, and it wasn't the blood that bothered me either (Well, the blood on camera thing was kind of unnecessary, and really doesn't make any sense unless you have a helmet with a visor of some sort or glasses or something, since your character wouldn't actually be seeing the world through a camera for the blood to get on, and the game really shouldn't try to call attention to the fact that you're actually viewing everything that happens in it from in front of a screen more than it needs to.) mostly it was the dismemberment, I mean, only the character's limbs and heads can come off and only at very specific points, and always the same ones, it would be a lot better if there were just more potential breaking points on the body, also, the dismembered areas really don't look very good, considering that they just have a flat surface with a gory texture and some flat things around the edges that try to look like torn flesh, it would have been much better if they at least added a few broken bones to the mix, or even just made the broken area not so FLAT, I don't expect or even want fully realistic gore, I only want something that looks slightly more natural.