That rule made sense because before the shot clock some teams would dribble the ball out for minutes, it was terrible. Pitchers weren't routinely taking 5 minutes in between pitches. I think it will be fine and everyone will get used to it, but I know there will be hell to pay for the rules committee if a very important game is affected by a pitcher one second off in his delivery.
Why? Games have been effected by the basketball shot clock, games have been effected by delay of game penalties in the NFL.
There are penalties for taking too long in golf and tennis. Chess games have been won and lost on time.
Baseball is the last to the table.