The Point , The hammer, turning your head from the field

[kcg NC2Ablu]

I have in the past done this as my signal : in the modified gerry davis I use I see the pitch stand turn open slightly and give the "old school" point as I verbally call the pitch. I have been since told that I should be using the hammer... then told it didnt matter but to not turn my head from the field for even a second. Just to preface that this is in rgaurds to a 2 and 3 umpire crew.
Yet when we go out to break up the conference they still want us to beat the catcher back to the plate which leaves our back to the field and let our partner handle it from there.
I ask what is the MAJOR difference between the first turning of the head (the field is actually still in decent view) where as when I turn and hustle back I have NO view of the field.
I know the first response is going to be that the ball hasnt been put back in play yet... but I just want to understand the method behind the madness so to speak.

(I have changed to just the straight up hammer similar to Ed hickox)