This reminds me of the question of why doesn't the NFL increase roster sizes? They add on an extra game to the regular season, something I feel like fans weren't really asking for, but an increase in the amount of players you can have on the active roster is something that would be great for a couple of reasons. One, it would keep players healthy knowing you got guys to rotate, and two, you will have more surprise and breakout players taking advantage of opportunity. (Making the NFL more exciting to watch) Yet I guess the NFL doesn't want to do that because it means more players they would have to pay. Less money going into the owner's (middle-unnecessary men) pockets.