AA will give you the option of changing schedule, and even probably date, where you are impacted by schedule change. What they *won't* do is:
1. Change their flight schedule.
2. Give you a refund of what you *could* have booked it for.
3. Let you use an SWU on non-AA metal.
P.S. - There are exceptions to every rule. And this isn't pointed to the OP here, but only to those who ask this question expecting AA to create a new flight to meet their original schedule.