It sounds so shallow a hope to have.... but i just hope it stops raining/snowing through solid surfaces. I do have high hopes for it, as even fallout 4 resolved that issue, but i could be omitted. At that point I would be able to make my own world space house myself without having to change the local weather to forever be sunny.
New content was mentionned as a no, I think, on Pete's twitter. However much weight that has. But they did day they are pulling all the stops to make the game look and FEEL as next-gen as possible. this could be a visual "look and feel" type of thing, or actually tweaking combat responsiveness/bow sway.
If they add fallout 4 type crafting, I hope they keep it simple. Iron, steel, wood, hay, glass, clay and stone.