A stellar pass rush
I think we can count on Stephon Gilmore having a good season. He has proven that he is the best cornerback in all the NFL.
Kyle Van Noy was one of the Patriots best pass rushers. New England will most likely have to replace him as he is a free agent.
We saw just how far the Patriots defense could take them. They made them look like a Super Bowl caliber team. The defense was single-handedly winning the team games.