This isn't just limited to OOTP14 ... I've wondered this, but never tried it or asked with past versions ...
For example, if a person is curious about whether the Padres would do better if they moved in the fences at Petko, if you go to San Diego's Edit Ballpark and change the distance figures, will it be reflected in the power numbers for teams there during the next season's game results? Or, is there something further you would need to do? Or, are the true distances imbedded in the game to where it won't make any difference to change the dimensions of real ballparks?