On more than one ocassion, AA has granted me full credit card refund or full voucher credit for truly immaterial schedule changes on paid tickets.

On more than one ocassion, AA has opened premium cabin saver award inventory on new flights, as a result of truly immaterial schedule changes on award tickets.

Don't listen to the regurgitators of official AA policy on this board.

Call in, play stupid, suggest a problem (MCT worry, misconnect w/ another ticket, etc), and guide the agent to the solution you desire.