Don't know about all that but he was playing through a foot injury in the first half of season as well which is tough on a lineman since it affects so much in pass rush.
He led the league in batted passes last year and has some weird ridiculous stat like nearly 70 career batted passes iirc (usually the league credits these as passes defensed).
Good edge setter, he's a spags type of power rusher, consistent guy who rarely misses games.
He may be a rotational guy at this point in his career but tbh this is probably the best case scenario for us as all the other vets like him either have injury concerns or are Jadeveon fucking Clowney.