I think the Jets' roster has been generally underrated the past couple of seasons. Chevy took a high-bubble team and added a bunch of quality and depth, especially at F.
Adding Vilardi, Nino and Namestnikov along with the arrival of Perfetti really strengthened the top 3 lines.
The 4th line has gone from a weakness to a real strength with the addition of Barron, Iafallo and Kupari.
On D, Samberg has emerged as a defensive stalwart. Miller was a sneaky good acquisition.
Overall, the Jets have a very balanced and deep forward group now, and the D is good enough. It's just that many pundits and fans didn't really recognize the transformation and quality.
Beyond that, Bowness brought in a very good 5v5 defensive system that the Jets are implementing effectively. They are really well-connected in the system now.
And, Hellebuyck is still Hellebuyck.