I would definetly want to see dead bodies left on the ground. This really is the marker for me how the battle is going. In CMx1 I never really understood the scale of my losses, well not atleast with a quick look. Bodies on the ground would certainly help this one.
As for the wounded, I would have them go on in the battlefield normally, but would have em act with reduced effiency. With reduced I mean, slower movement and firing speed.