Vlasic isn't going anywhere. He has a NMC and has definitively stated he does not want to leave San Jose.
Just because the Sharks have to expose four guys does not mean that's the only players Seattle could choose. There's a bunch of guys (pending UFAs, young-ish kids in the AHL) who do not have the contract and/or NHL experience to be "exposed," but CAN BE SELECTED by Seattle (after they pick the 24/30 that do have to meet the contract/experience criteria).
(Heck, Vegas picked one UFA after a side deal and let the guy walk.)
My notes on expansion draft, including the guys that could be picked (e.g., guys who aren't exempt but don't meet contract/experience criteria to be exposed).
2021 Expansion Draft
There are two ways you can go with the exposed guys. First, choose the "least worst" (to Sharks long term plans if lost) players who meet the criteria. Second, chose guys with contracts they are not playing up to for cap space relief.
Jones vs Korenar - Korenar played a heck of a lot better in his limited NHL experience and had good numbers in AHL (after sophomore slump). Jones is a bit of a albatross with his contract compared to his (usually) less than stellar 2021 play. For cap and "least worst", it's Jones who will be exposed. (And I don't expect Seattle to touch him, unless they need to help make the cap floor, as a backup.) (For the person who suggested Jones be assigned to AHL, it'll still be $4.75m cap his with him down there; but his cap hit will be under $3m if
bought out.
Burns vs Simek - these are the only two guys with the experience who don't have NMCs. Simek, 28, has injury history (with unknown long term performance future - knees), but good performance (when healthy). Burns, 36, has been productive, but is he really worth his $8m contract; he's also a player with a humongous "personality", and a workout fiend. You expose Burns for potential cap relief with risk that another team will pick him up via trade. (I'm still putting Simek out there with his knee issues and keeping Burns.)
Forwards: Gambrell (with new contract) and Lebanc are my two exposed. If the latter picked, would provide some cap relief. (Protect Couture, Kane, Hertl, Meier, Balcers, Donato, Dahlen; also available: Halbgewachs, Letunov, Marleau, Nieto, Sorenson, True, Viel)