1) In game I would love for earthquakes to happen. It wouldn't need to destroy anything unless you guys decide to add that for realism.. but just to make people fall over. A super old text based game I use to play called Gemstone used to do this as a precursor to an invasion or a special merchant selling good-rare-epic quality stuff coming to town.. or just for purposes of having an earthquake..
2) I would like it if there were treasure chests small enough to pocket and for people to use a lock picking skill to open them, likewise bigger or even immovable chests to be picked. Traps on these would be cool as well. Again this is from the same game I use to play.
3) I would also beyond anything else, like to see this implemented. The ability to tackle someone, and to aim for a particular body part in an effort to disarm or dismember them.. A target laying down is much easier to kill is the logic. Likewise this would lead to being able to taking a head off of a unlucky foe. I am not asking for gore and guts.. Just the ability to do it. I have only seen this in Gemstone and I think the Conan game?
Not having these wont keep me from playing, but I think these are some really interesting things to have in a game that give it more depth.