Would be now very very smart to trade a package like Tatar, Sheahan and Ouellet (+pick) for one quality piece like Shattenkirk when considering the expansion draft.
Most probably teams are allowed to protect 11 players + 1 goalie under 2 seasons of pro experience. Mantha and Athanasiou then has to be protected, and only Larkin is safe without protection.
At Current situation, I would protect:
1. Zetterberg
2. Nyquist
3. Abdelkader
4. Tatar
5. Sheahan
(Larkin, only 2-year pro experience after next season, safe)
6. Mantha (over 2-year pro experience at june 2017)
7. Athanasiou (over 2-year pro experience at june 2017)
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unprotected
8. Franzen LTIR
9. Glendening
10. Miller
11. Pulkkinen
12. Jurco
13. Nosek
14. Miele
1. Kronwall
2. Green
3. DeKeyser
4. Marchenko
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unprotected
5. Ericsson
6. Smith
7. Ouellet
8. Sproul
9. Jensen
1. Mrazek
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unprotected
2. Howard
Trade Smith away somwhere at this season before the expansion draft, so he isn't there as an attractive piece. Also Ouellet goes away, so it takes out a possibility Las Vegas could be interested in him. Trading Tatar and Sheahan will open two spots, and another goes for "Shattenkirk". Then another could go to UFA, if we get somebody at this summer.
After trades:
1. Zetterberg
2. Nyquist
3. Abdelkader
4. SOME UFA
(Larkin, 2-year ELC, safe)
5. Mantha
6. Athanasiou
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unprotected
7. Franzen LTIR
8. Glendening
9. Miller?
10. Pulkkinen
11. Jurco
12. Nosek
13. Miele
1. "Shattenkirk"
2. Kronwall
3. Green
4. DeKeyser
5. Marchenko
------------
unprotected
6. Ericsson
7. Sproul
8. Jensen
1. Mrazek
------------
unprotected
2. Howard
There there would not be anything very interesting left, and we would extremely happy if Las Vegas claims Ericsson or Howard just to fill their cap hits to cap floor.
Would be a party time!
EDIT:
To build roster for this 2016-17 season before the expansion draft, go with 1-year UFAs (who will walk away anyway before the expansion draft), and/or bring in under 2-year pro experience kids (like Bertuzzi, Russo).