Call the strike zone according to the rule book and that will allow pitchers to attack hitters without nibbling, deep counts, and the surplusage of walks. I think it would result in more balls put in play and more action. Whether it reduces game time or not, the game would involve more action.
I'm always amazed that, when they put up that K zone box on the screen, the top of it is set to what MLB umpires call and not to where the rule book provision would indicate. I'm tired of people claiming a pitch at the belt buckle is high and therefore a ball. I still don't understand how or why this ever got started in the first place.