Haven't been able to find time to write an analysis for each team but some quick notes:

NOLA was once again the best possession team in the league but underperformed (it feels like simon hates you for no reason, you were definitely good enough to win at least once over the past 5 seasons)
Since S46 Tampa has had a high pdo every even season (S50, S48, S46) and low pdo every odd season (S49, S47) so will be interesting to see how they do in S51
NEW is still good but their sim luck regressed compared to S49
Minnesota was... a top 3 team and historically unlucky? (Watson - Gibbles - Mayfield was the best corsi line in shl, really surprising results)
WKP had a bad season for the first time in forever
Texas was historically bad