From that argument, why is it so important to keep the old field? If you are just there to watch the game, why do you need the ivy, the bleachers, etc.? Because the way the bleachers shape the dimensions of the field and the way the ivy affects the play of the ball IMO add to the game. Those other things provide a distraction to the game. So it's the dimensions of Wrigley that make it great?. Tiny foul space, wind having a huge affect day to day, deep lines and too-short power alleys. Those are not the elements of a park that shapes great baseball. The tall grass is nice, though.