Just as an information point:

AS sent out an email notification to all MP members on May 14 that the exit row numbering change was going to be rolled out over the next several months. The message stated "We are doing what we can to minimize the impact this may have on your desired seat assignment, but to ensure your travel experience goes as seamlessly as possible, you can also help by monitoring the seat assignments you may have for upcoming travel transpiring in the next few weeks."

Right or wrong, the onus was placed on the customer to monitor his or her itineraries. If an undesired change was noticed, the traveler was expected to be the moving party toward achieving a satisfactory resolution.