Agree, though the 'forward please' training worked very well for me, it's always hard to change a very, very fixed habit.
The two people - one in the saddle, one on the ground - might be able to pull it off if they communicate very well and react very quickly to each other....me, I like to fix problems like this with as few people as possible, and as little equipment as possible. I also take off the chain shanks, control halters, and everything else, with problem loaders...as well as suggest everyone 'trying to help!!' convene at the farthest pickup truck and have a beverage and listen to a CD.
Rather than being something the horse does on command, it's a set habit he does every time he's around a person. Even people, if they do something over and over one way, find it awful hard to change a habit, even when they consciously want to.
The 'turn and face me' behavior is something that is for every single interaction with the horse - every single day, every time he moves in his stall or field or pen, basically in all training sessions. Even if the horse gets no formal 'ground training' at all, every single time a person is around him he is expected (and made to) turn and face the person.
Behavior is a lot more flexible and adaptable if it is 'command based', not routined and made a rigid habit. So say, instead of getting the horse so he always does some thing when he is in a given place, position or place related to whre his handler is, it is on command, and other behavior can be commanded too. So I teach my horses to face me when they hear one command, and to turn and go forward when they hear a different command.