Okay, so the fact is that trading Trouba makes the Rangers captain-less again like the ~4-5 years prior to bringing Trouba in. Who takes over if he's traded? This team has no leader without Trouba. Zero. Teammates like Kreider, sure and that's great. But another near-fact is that he declined the captaincy for years and there is no one other than him that is even close to deserving it aside from Fox based on his play. Trocheck could be in the running based on his personality, but who knows. Laf is too green still. This team NEEDS some boneheaded neanderthal like Trouba to act as a leader otherwise they are the rudderless ship that was the team before he got here.
I'm sure Lindgren is also a great guy and I'm sure the guys like him - He is the one that gets traded if it's between Trouba and Lindgren. Has nothing to do with sentimentality toward Trouba and everything about this team reverting to a leader-less group. Lavi showed he has no problem reducing Trouba's minutes. Drury now has to make a move to improve the rest of the D and Lindgren is more easily movable and we'd see the biggest upgrade bringing in a legit partner for Fox.
Callahan didn't force his way to NY, and drove himself out of NYR more than anything with his contract AAV demands. Not much to leave to sentimentality when your captain is chasing a check - and that was well within Callahan's right. And good for him since he ran his body into the ground the way he played. Admittedly I don't remember the context surrounding McDonagh's trade, but he also didn't force his way onto NY and it looks just like Gorton was throwing shit at a wall and hoping something stuck - which absolutely nothing did. I think Noah Laba is the only asset left from that trade. With hindsight, not many moves Gorton made were close to good, with the McDonagh+Miller trade very much at the top of that list.