With the way that Morrissey-DeMelo have been playing, I'm starting to think that our biggest hole on D is a 2 LD to pair with Pionk. With Stanley, Heinola and Samberg as internal options to provide an upgrade on Forbort, I wonder if the need isn't as acute. Heinola can add some offensive spark to the D, and Samberg brings the defensive shutdown ability. Stanley might bring a bit of both, at least on a 3rd pairing.
It might be a bit of a risky strategy for a team that wants to be a true contender, but acquiring a bona fide top pairing D would be very expensive. One option might be to go into next season with internal solutions on D, expecting that to be at least good enough to put the Jets into a playoff position while they assess Heinola, Samberg and Stanley. Then they can consider acquiring a D at the TDL (ideally with some term) if they are close enough, but don't look like they have the D to be a champion calibre team.
I do think the Jets could use a bit more depth up front, particularly on RW. Wheeler is not likely to maintain his level, and if Appleton goes in the expansion draft, the Jets will be quite thin on RW. They could use a strong RW. Armia might be a really good fit, to play on the 3rd line with Lowry, and slide up to the top 6 at times. If the Jets can re-sign Copp and Stastny...
Connor-Scheifele-Wheeler
Stastny-Dubois-Ehlers
Copp-Lowry-Armia
Harkins-Gus-Vesalainen
Morrissey-DeMelo
Samberg-Pionk
Stanley-Heinola