It would be useful to have soldier rank and kills in the battlescape screen so that you can more easily decide which soldier should take a shot, to give more experience to the inexperienced ones. I know you can see this in the health and stats window but it is a pain to click it for each soldier just to find out which ones need more experience. Perhaps the rank and kills number could be added to their name in the top left of the battlescape screen, there seems to be enough space for them there.
On another note the small pic of the soldier face in the top left of the battlescape screen is not really useful and could be removed. Once they start wearing nanocomposite armor their faces all look the same anyway. The only thing that face might be good for is if it shows if they are injured, like injured soldiers could have a really pained expression on their face or have a bloody nose or black eye, like the face in Castle Wolfenstein 3D or Doom II, but then this would have to show their face without armor covering it.