IMO, the advantages of any use year are quite limited. One advantage of December would be if you take December-February vacations regularly, you're points would be better protected should you have to cancel a trip...meaning, you'd have plenty of time to re-book another vacation before they expire, or their banking value starts to decline.
I don't think December would be my first choice. We vacation in June and November. Borrowing Dec points into November would be risky... and any cancellation would also be a problem.
I can't imagine why anyone would be interested in getting the upper hand in booking in the year 2054.
Getting 2003 points. Huh?