Are you talking the display of the strike zone, or how umps are calling it? You can change the view to make the displayed strike zone different. Try playing around with Pitching View to see different options. If you are talking about bad calls, there is a setting to have individual umps call slightly different strike zones and occasionally make mistakes, or have perfect calls every time. I think you can only set that one time when you start the mode.
But for the record, I pretty much only play Franchise and haven't noticed issues with meatballs not being punished. But I play on Zone hitting with Veteran difficulty.