There are many things in that trailer that I wish would have been implemented.
Mostly the ability to actually get above a lot of the map like the guy wearing The Anger suit. There are so many spots that look like you were once supposed to be able to get to, but now invisible ceilings block you from doing so.
Also: dual weilding.
Oh, and you can fall to your death. It’s just that it takes a very high fall, and the only map I’ve ever actually taken fall damage on was Security Tower. But I did manage to kill someone by making them fall to their death, on that map. I was sitting up on the pipes under where the Resistance spawn after Security get the hostage out, and melee’d a guy in the back as he dropped down in front of me, which sent him flying to the floor below on his back, killing him. Didn’t give me credit for it, though; just said he killed himself 