I don't disagree, but would only note that I think the Jets will be reluctant to go into the season with Kulikov's health in question, Niku as a rookie, and Poolman as the only RHD behind Buff and Trouba. The Jets are in their "win now" window, and would be very reluctant to leave themselves highly vulnerable to an injury or two on D. They might actually consider Myers more as a 1-year rental, while they are in their competitive window. Without Myers, this is how their D shapes up (today)...
LD:
Morrissey
Kulikov (injury concerns)
Chiarot (struggles with speed)
Morrow (needs to be signed)
Niku (rookie)
RD:
Buff
Trouba
Poolman
Nogier?
An injury to Trouba or Buff pushes Poolman up to 2D, and likely requires Kulikov or Chiarot over to RD, leaving a big gap on LD. Two or more injuries to the top-4 means the Jets are looking at Nogier in a regular role.
I think the Jets could paper over Perreault's departure much more easily than Myers on D.
Having said that, I still think the Jets should consider moving both Myers and Perreault for a very good #2/3 C, and then perhaps make a supplementary move to get a lower end RD to play on the 3rd pairing, or behind Poolman.