If they wanted to take this to the next level, they could let one store preferences in their AAdvantage profile -- e.g., rebooking on a connection is preferable to an overnight, rebooking to an earlier departure is ok if within x hours, rebooking so that one stays in their current cabin is preferable to a downgrade if such options exist within x hours, etc. The algorithm may not always be able to meet one's preferences, but it could be programmed to take them into account. I'm not aware of any airline offering this level of intelligence, but it would be a nice touch, even if it's limited to certain FF tiers.