Thompson would be my trade chip. He is not a 1C and should return a better haul than Cozens. I would be looking for a C in return. It also ends the meme that he is a difference maker. Yes he will produce elsewhere but in a reduced role. I don't care. He is a huge part of the problem of having players playing their game and not a team game.
From the NHL roster
Keep:
Dahlin
Benson
One of Power/Byram
UPL
Listen on everyone else.
From the prospect pool
Keep:
Kulich
Helenius
Wahlberg
Novikov
again listen on everyone else.
Criteria for evaluating players:
Hockey IQ
Willingness to be physical
Proven production in their role. I.E. 3rd line production for 3rd line minutes etc.
Skill is nice to have but production is better.
I do not think this will happen, but this is the season of unsubstantiated hope.
I know I'm the Ostlund cheerleader, but it's for a reason. His hockey IQ is potentially the best in the organization. It's why I wouldn't think of moving him. He's got the ability to read plays as a center and make everyone better.
I know a scout for the Bruins through Power Edge Pro. I'd simply adopt their critieria. Scouts in the Bruins organization are not allowed to advocate for a prospect if that prospect does not meet any of their top 3 criteria:
1. Hockey IQ
2. Character
3. Work ethic
Let's go down the list of centers who are scoring at a PPG or better this season:
McDavid - NMC + untouchable
MacKinnon - NMC + untouchable
Draisaitl - M-NTC + untouchable
Point - NMC + untouchable
Necas - don't even talk about it
Eichel - NMC + LOL
Barkov - NMC + untouchable
D Strome - zero chance he gets traded
J Hughes - untouchable
Kopitar - NMC + untouchable
Scheifele - NMC + untouchable
Robert Thomas - zero chance he gets traded
Aho - NMC + untouchable
Seguin - NMC
N. Suzuki - I can't see Montreal trading him to Buffalo
W Nylander - NMC
Granlund - Pending UFA
Kempe - M-NTC
Duchene - NTC + pending UFA
Necas, Strome, Hughes, Thomas, Suzuki, and Granlund are the only guys that don't have trade protection that are over a PPG this year. And not all of them would be an upgrade over Tage at center.
I'm not sure the Sabres need an upgrade over Thompson. They could use a running mate. If they do it right it won't matter who is 1C and who is 2C.
You can cross Miller, Barzal, and Trocheck off the list with their trade protection. Likely Kadri too.
Norris isn’t an improvement over Cozens, at least not now, and the injury history would make me less interested anyway.
No way Rossi is available.
A swap including Beniers or McTavish is interesting, but that may end up being just rearranging deck chairs on the titanic. But I’m certainly open to it.
Seattle would be interesting because they really don't have a true 1D. But they also don't have a lot at center, and trading Beniers would gut them down the middle.
Anaheim is the target for me. They've got Carlsson as the 1C already, with Strome at 2C. MacTavish is the 3C and Zegras was pushed to wing. Lundestrom is their natural 3C and Gaucher is in the pipeline. They've got the opportunity to trade from a really deep center position. Anaheim also does not have a 1D with the offensive upside of Power.
I'd look at something like Power and Quinn for MacTavish and Zegras, with some extras to even out. Anaheim is also losing Fabbri and Vatrano at the end of the season, so Quinn could be a nice way to add a playmaker for them in the spot Zegras was occupying, and fortify the wing.
This is what Anaheim would look like, healthy:
Killorn - Carlsson - Leason
Vatrano - Strome - Terry
Quinn - Lundestrom - Fabbri
McGinn - Harkins - Gauthier
Power - Trouba
Mintyukov - Gudas
LaCombe - Helleson
x Dumoulin
Sabres afterwards, healthy:
Benson - Thompson - Tuch
Peterka - Zegras - Cozens
Zucker - MacTavish - Kulich
Malenstyn - McLeod - Greenway
x Krebs, NAK, Lafferty
Samuelsson - Dahlin
Byram - Jokiharju
Gilbert - Clifton
Sabres have some forward depth to make another move for a D. Adams could even throw in someone on the Anaheim deal to get a D and even it out. This type of deal works for Anaheim under the cap and also leaves Adams with a lot of cap space to make moves to fix the D (like a Weegar).
You don't need to move Dahlin for chances at centers. They just can't be established yet. Which is why I propose the above as the type of trade.