The end of the 2016 season saw massive swings in the league’s all-time Elo ratings. To start, here were the results from Week 25:

The Lannisters suffered an upset to the Happy Hollidays in a meaningless game. Chris and Larry gained a handful of points, and the Possums ended the year on a positive note. Of more interest is the year-over-year comparison. The next table shows this season’s results compared to last year’s final numbers:

The Possums show a massive gain for 75 points from last year. The Goofballs were close behind, gaining 63 points. The Armadillos and Lannisters gained a few points. Heather and Chris P. each lost a couple of points. The biggest point losers on the season were the ThunderWolves and Happy Hollidays. Kyle lost 33 points and Chris M. lost an incredible 117 points.
This chart shows the all-time rankings over time:

This chart shows how each team has fared over time. The Legion fell from their league all-time highs and finished just below the Lannisters. Jeff was able to capture the all-time lead from Chris by a slim margin. The Possums show a nice upward trend this year, while the Goofballs shot up near the end of the season. The Armadillos showed a steep decline in the second half. Kyle fell off early but held ground for the end of the year. The Happy Hollidays steep decline is also shown.
The most important thing to note is that the gap between the best teams and the middle has closed. The Legion no longer have the massive lead they build up in 2013. The Lannisters are at a high level, but seem to have plateaued. This is reasonable considering the team has won two straight titles and it’s hard to build many points from there. The teams in the middle, with the exception of the Holidays, are grouped tightly in the middle. With a winning run, any could challenge the leaders.