We're into the offseason, which means we're once again checking the mail. The TAFS mailbag returns with more than a few questions about what we can learn—or not—from this season's Super Bowl teams. Robert Mays, Derrik Klassen and Dave Helman tackle questions on big nickel, attacking Mike Macdonald's meta, teams that experience a one-year turnaround similar to what we just saw from the Patriots, and a whole lot more.