Lindgren was not included in the post I quoted.
Ah... well, I will point out that I said "eventually, if not right away, the defense looks like this..."
Lindgren probably stays in that top 4 for the immediate time being if Trouba was to be traded. So that is not an immediate swap-out.
The idea is that Miller-Fox and Jones-Schneider are the eventual long term top 4 pairings.
It's just my opinion, but this is a recipe for a giant step back next year. I'm not really sure you're considering just how hard it is to play NHL defense for an entire year. Trouba is extremely experienced and eats a shit ton of hard minutes. Just assuming Schneider can absorb that in and of itself is a giant stretch in his sophomore year. Add on to the fact that you're pairing him with Jones, basically a rookie, since you're jettisoning Lindgren, and it's even more likely he has serious struggles.
My conceptualization would, again, be that the eventual pairing long term is Miller-Fox and Jones-Schneider, but for next year, if I traded Trouba and a first for Detroit's first and took Lambert, it would probably be Miller-Fox and then Lindgren-Schneider.
The third pair would be highly similar to this year and we'd be rolling with Nemeth or another vet, and then a platoon of kids in Jones, Robertson and Nils rolling in and out. At the deadline you could add another vet to stabilize if needed.
This is a step back on D, but it's not a "giant," step back. The third pair with Nemeth or a vet and a combination of Jones, Robertson and Nils is probably RELATIVELY similar to our D this year with Nemeth/vet and Schneider.
It's the second pair that suffers. Lindgren-Schneider is probably worse than Miller-Trouba. But Miller-Fox is probably better than Lindgren-Fox right now, as Miller continues to ascend and frankly, so does Fox who is only 24 years old. And Lindgren probably grades out better against easier matchups as well.
It's a step back on D, but the trade off you are getting is a potential future 1C.
That's massive.
Massive.
And for the people who are on-board to win now - the cap savings from moving Trouba allow you to re-sign Vatrano, Motte, and Blais and you can ice a dominant fourth line. So defensive downgrade, but massive upgrade to your forward corps, both now and later.
And you still have another spare defender (either Lindgren, Nils, Jones, or Robertson) as trade bait.
Getting to the third pair, Robertson has never played an NHL game, so just penciling him in and assuming he does fine is a stretch. Nils was meh this year, but I do think getting him or Jones in the lineup next year makes sense.
It's not really a stretch to say your highly touted kids have to make NHL debuts at some point. These guys are getting into the line up next year one way or the other. The idea is that they are going to be good enough to actually be worth putting into your lineup.