I believe tactics have to change or improve, otherwise if everyone knows the tactics where is the upperhand you are suppose to have when you are planning?
LOL in the picture in the hyperlink, how come there is got guy relax squat one corner while the other 2 point weapon clear room?
Now with paintball, I think FIBUA becomes more fun and painful and therefore people learn faster. Nothing like paint splatter on your back from friendly fire as a lesson on clearing rooms.