One thing that really sucked about DOS:1 was that you end up with an empty world littered with corpses. After looting the world, there is pretty much no point in going back.
What I'd like to see is more of a kill and replace aspect to the game. Such as the three Voidwoken Turtles for example. After the battle, it would have been cool to see a new turtle family there you can talk to.
Not all battles would have this, but would be nice that if after about every 5 areas where monsters were killed off that forest animals or even peasants trying to rebuild what was destroyed. Even if they have little to talk, would still be nice to repopulate the world. Maybe they could even have found items of use later on in the game.
Animal dialogue idea after Voidwoken turtle battle.
Turtle: "You wouldn't believe how congested the current way was. All you need is one whale that wants to rubber neck and it just jams everything up!"
Character: "What is a rubber necking?"
Turtle: "You know, sight seeing. Looking at the same old coral reefs and galloping sea horses in the distance. Instead of paying attention and swimming, gotta slow down looking around and back up 8 lanes of fish up trying to head home at the end of the work day...
Character: *clearly the turtle is dealing with some kind of odd stress your unfamiliar with and kindly depart*