The umpire still calls balls and strikes during the game, and each team has two challenges. A call could be challenged by a pitcher, catcher or batter by tapping the hat or helmet. If the call was overturned, the team kept the challenge. If the call was upheld, the team lost one challenge. I was skeptical at first, but after watching a lot of games since then, I am not opposed to it.
Women have been a disaster as generals, police chiefs, and judges. Umpires? What could go wrong?