Here are few examples of realism that Raven could try to integrate as part of JK2, because some of them have already been done before and help immersion to the game:
1) When killed characters fall to the ground, their limbs or part of the body should never go through structure. Same as when Kyle walks over those bodies, he can't set his foot through them.
2) Plants move aside and trees shake when characters/animals move close to them. Also, trees should fall to the ground, if shot or slashed with lightsaber.
3) While walking on a watery terrain, it slows down movement depending on how much of characters bodies are underwater. As they emerge from the water, they leave little puddles behind them.
4)Characters leave footprints into snow or mud, and we can see Kyle's breath evaporating in a cold climate.
You got something more to add?