I think this is the big key. My harebrained thought to limit shifting, increase balls in play, and speed up the game is to enlarge the size of the strike zone a bit. In my head at least, this forces batters to swing more for contact instead of trying to jack everything out, forces batters to shoot the ball the other way more often, and might entice managers to put runners in motion with hit and runs and other plays that are more exciting than walks and strikeouts.