I like this idea, a stand alone mode would be good...that way those who want to perfect their stick skills can do so, and those who really don't have the time to do so can skip it without penalty.
I'd love to see it put in to Madden. Granted, this mode wouldn't be all that effective until the on-the-field gameplay and physics are fixed. Hard to teach football technique and execution correctly (with the proper rewards) when the players aren't even playing and reacting like humans.