I think everything around him starting falling apart. Only 1 other even started the 12 games he started, and that was his center, Jason Kelce. They were a little healthier on the OL in 2019, but notoriously lost every WR they counted on at some point in the season. And his 2019 wasn't bad. It was pretty average, but he wound up with near the same yards per game, same INTs, and much better completion % than his MVP caliber 2017 season. Seems like a textbook case of a guy trying to do too much with everything around him falling apart. He got sacked 2nd most in the league 50x this year, despite missing 4 1/2 games after being benched. Their line was atrocious. to be clear, i'd take him over running it back with mitch (or, god forbid, foles) but that's about the most i can say.