Next season it's safe to assume the top 6 as some combination of:
Gauthier-Carlsson-Terry
Killorn-McTavish-Zegras
For the bottom 6, players such as Leason, Carrick, and Lundestrom all seem like obvious re-signs and fill in 3 of those spots. All of the other should be let go besides Vatrano and Strome IMO. I would look for a 3rd line center in UFA short-term.
Vatrano-xxx-Strome
Carrick-Lundestrom-Leason
On defense, it seems like Fowler, LaCombe, Mintyukov, Luneau, and Gudas are locks. Gudas is a short-term solution and Luneau is a rookie. Any player drafted on defense will be at least 2 years away from truly contributing. It seems clear a top 4 defenseman is needed going forward. Maybe they can use the assets they get for Henrique and/or Lyubushkin to trade for a defenseman in the summer.
Fowler-Gudas
Mintyukov-xxx
LaCombe-Luneau