Sensors on the uniforms.
Who inspects the sensors before every at bat? How low are you going to let them crouch the next two pitches if they go 3-0 in the count? I like something on the player because stances change depending on the game situation, and yes the strike zone should too. Some, anyhow. But an ump wouldn’t change his zone to much if a player tried to make a shorter strike zone. Ball height passing over the plate on isometric measurements of the player might do it, but you would then be losing the stance changing the zone at all. I wouldn’t be totally against something like that, I guess.
Freegards