I have to think the RPG guys wouldn't have rushed in so close though, clearly that was for dramatic effect and added challenge.
I could be misunderstanding you, but i think the rushing in of the rpg guys was to make it possible to win, hence much, much easier rather than trying to tag an rpg'er quickly coming out of hiding and firing one in. I personally didn't appreciate that part of the demo, seemed like a shooting gallery rather than anything you would actually see outside of WWII/I, but even in WWII, people didn't just run up and stand there so you could shoot em, they would have dived to the ground for cover after advancing.
If i were designing the game, i would have had the squad keep an eye out for awhile, building up a little suspense with a few shouts from your AI teammates about seeing movement, then, after a few scripted shots, sending you and one other guy in to clear a building while the rest kept watch. Less is more in a lot of cases.
btw, this game plays very good at 2560x1600, no AA, everything else high with my 3800+ and 8800gtx.