In good faith, I have to assume that difficulty in implementing it the way it's been in almost every other football game where it's a tool you can use to make permanent changes in your dynasty/franchise menu that stick throughout the season must be the reason. However, the fact that the exact system is already in the game but only available while actually playing a game from the play call screen (at least make it available in the pause menu argh), does give me pause as to whether it actually would be difficult or if the issue is just more so that it's not viewed internally as a priority. Again, I tend to give the benefit of the doubt on these situations but I can't help but think it's odd.