In Superstar mode, when you practice, you will be learning your team's default playbook with default audibles and not the one you desired on your profile. For example, if your Superstar HB's team is the Dallas Cowboys, but your desired offensive playbook is the New England Patriots, you will be stuck with your team's playbook. The main problem with this is when you are a defender learning in a 4-3 team when you are more comfortable with the 3-4 (or vice versa). Kickers and punters are mostly unaffected because they only have to punt and kick field goals, and those do not change in any playbook.