It's honestly a lateral move for both teams. 3rd line RW that could score more given a top 6 role for one of those from a different team. Both players are looking for/need a change of scenery. One player is bigger, the other can play some Center. They're both fast.
As the Jets I wouldn't add despite the fact that Roslovic is holding out. With the expansion draft we'd still have the same protection issues either way. My preference would be to trade Roslovic for an expansion exempt RHD prospect, likely drafted in the 2nd round. (i,e. Korczak from Vegas, Grans from the Kings, maybe even add to get Peeke from the Jackets, etc.) If I couldn't find a trade like that I'd see what Seattle would be willing to give me to leave Roslovic exposed in the expansion draft. If I didn't like that return than this would be my 3rd choice. Appleton is doing good in that spot so there's no rush to do anything on our end and really getting a different bottom 6 winger that is older and more expensive isn't an ideal return in my books because we have lots of Wingers that could fill that spot. If the other options didn't pan out I'd do it straight up. I wouldn't add.
The fourth option of sending a message that we won't be bullied also works for me. Roslovic has no arb rights, he is not a star player yet. He's inching closer every day to my "4 years at $1M AAV" offer or sit out the year point. We didn't blink on Kane or Trouba until we wanted to move them and got the return we wanted. This will be no different.