We now have the technology to make the game fairer and better so why not improve on it? In hockey they have cameras in the nets to make sure a goal is legal. A 3rd. strike can end a game, that's way to much power given to an ump when so much is on the line when there would be no dispute when the legal right call would be made by the computer generated strike zone.
Some umps are vengeful and will purposely give a hard time to batters/pitchers/teams on border line pitches.
I'm an old fart all in favor of making the game more fair, I hate it when bad calls are made, specially when they have the ability to fix the problem.