I don't think the Williams performance can be emphasized enough.
5 QB hits, a career high, and 1.5 sacks, more than he had in 8 games or whatever with the Jets over the first half of the year. Parsons has only had 5+ QB hits five times in his career, Chris Jones only four times in basically a decade, and this guy does it in his very first game here.
And in only 33 snaps.
The storyline for him this year was that his run defense took a leap, I believe PFF had him as the top ranked DT vs. the run (for what that's worth), while his pass rush might have dropped a bit compared to years past.
In reality I think you were just seeing the result of him playing on a team that was constantly down, and usually big, and playing offenses that could pick and choose when they would pass without pressing and opening up clear pass rushing opportunities. He probably looked dominant vs. the run because that's what he was seeing the most of, without many ideal pass rush chances given the Jets have been down 2+ scores for probably about half the season.
So if we're getting one of the best run-stuffing DT's in the league, plus that sort of a pass rusher, we could be looking at a Chris Jones-level player in his prime for the next 2-3 years.