Good point, the Vegas line is a snap shot in time. What if this new offensive system quickly takes hold and the Saints win their first two games? Check Vegas again and you'll see 11 games as the ceiling from 8. Its easier for Vegas to quantify a teams success by the addition and subtraction of players. It cannot quantify a philosophy change or coaching changes. Best example, the Chargers add one of the best coaches ever in Jim Harbaugh, but yet bookmakers are expecting the Los Angeles Chargers to be slightly worse in 2023, as the team's over/under is set at 9.5 wins, compared to the 10 games they won last season. So there you go.