Fine and dandy but I have been around softball players for years and none are taught where to stand front to back due to covering the plate. The issues are being able to catch up with fast pitching or delay hitting slow pitching AND to avoid break.
Like was posted, this discussion is based mainly from people who have never hit off a fastpitch pitcher in competition.
If you pitch the ball straight the hitters will hit it both from 40 to 43. Hitters are taught to read spin, not stand in the back of the plate and "see" break, because then it is too late to hit it.
Anyone who teaches rigid placement (esp in face of it not working) in my opinion is not giving the player tools they may need to be successful both in sport and life.
Actually the idea of avoiding break is all about plate coverage, its just that coaches either don't realize this or articulate it this way. Getting the pitch "before it breaks" is all about getting "the barrel" to the pitch regardless of how much its breaking. But it generally is not expained this way.
I agree, coaches also use box positioning to try and affect timing the speed of the pitch. But I dont think most people realize the effect is not great, it is basically the 2-4 feet you move (you can't move the full 7 feet of the box). If you have a batter who is at the limit of bat speed and is late, it may help to move further back. But for most decent and good hitters I believe it is more effective to stay where you are comfortable in the box and try and read the pitch 2-4 feet sooner. (Again I am not saying this is easy, but I am also not giving up my plate coverage by moving back).
One of the other points I was making is the comparison (not by you, but commonly by others) of girls, mostly 18 and under, with adult men and that the reason why some things may be done differently in womens softball are because we are inherently dealing with female children and adolescents, not adult men.