Theoretically speaking if moving up in the box to 'hit it before it breaks' works then the counter move is to 'backdoor' your movement pitches, basically start the pitch out of the zone and bring it into the strike zone at the last second. If a RH hitter moves up in the box to hit a RH pitcher's curve before it breaks to far outside then the pitcher should start the curve way inside and break it onto the inside corner. If the hitter is up in the box she will have to make contact out in front and basically pull the ball foul or let it break in for a called strike. But I'm not so sure that late break is really that much of a factor. If a pitch starts to break 20ft out and moves 10in that's 0.5in of break per foot of travel. Moving up in the box 2ft is only going to change ball location by 1in, that doesn't seem like
Limited seeing all the batters move up but it seemed to mess with the umpires strike zone. Maybe individual umpire. Called a lot of high balls that were thigh high. No clue if this is normalRoughly speaking, time for fastball from pitcher’s hand to catcher’s glove is .54 sec at 50 mph, and .49 sec at 55 mph.
If the batter is able to utilize 6 ft of the box from front to back, the time the batter sees the ball changes by ~.08 sec (@50 mph) or .07 sec (@ 55mph) from the front of the box to the back. (Time it takes to blink =~.1 sec.)
Interestingly, drop over the same distance (gravity effect only, no spin taken into account) is ~1.3 inches (@50) and ~1.06 in (@ 55).
I promote setting up just behind the middle (not all the way back, but some) to get some benefit of seeing the ball a little bit longer, but also seeing the ball in the same strike zone that the umpire is (supposed to be) calling. I’m very opposed to giving pitchers two opportunities for a strike by creating two zones (one for hitter, one for umpire). And yes, I have seen plenty of pitches that changed zones from the front to the back (even middle) of the box.
(Numbers here not meant to be perfect calcs, but close enough for comparisons. Too many variables for me.)