Is it exciting to have Davey Johnson out there kicking dirt on the ump for 3 minutes while the ump pretends to not listen? Fire up the George Michael Sports Machine (TM) and lets watch a replay get the call right and everyone goes back to their positions.
And what happens if they make a challenge in the third and someone freaks up in the seventh? Just stew in the dugout? Either they're all in on the human side and deal with the occasional freakup or they go all in on the automation and turn what most people view as a boring sport into an even more snore inducing game.