It wouldn't do much to create action but it would keep the game moving, which is one of the biggest goals of MLB right now.
They've tried giving the umpires responsibility of keeping the pace of play moving quickly and the umpires have essentially ignored it. They're still allowing hitters to step into and out of the batter's box at will, adjust their batting gloves, scratch their nuts, take a deep breath, assume their batting stance, then call time out so they can start all over again. If the umpires aren't going to do it someone else has to.