Well, I'll disagree on a few points here.
First of all, the Hall for Larsson was widely seen as a poor trade and had a very clear winner --- the team that walked away with Hall. If anything, that's a cautionary tale about making this type of move, not an endorsement.
I personally do not view KK as a future 1C. I never have. I was not a big fan of his draft day, and I don't think the Rangers were head over heels for him either. So that's not going to entice a move.
Suzuki and Caufield have a chance to very good players. But neither one of them is a franchise player, or realistically even close to one. Again, if I'm trading a player whose presence reverberates up and down the lineup, I can't do it for the type of guys who I'd want to benefit from that type of reverberation.
A mid-first is nice, but I don't really need a mid-round level prospect.
Poehling is a former first, but that doesn't mean to me at this point. I evaluate him based on what he's do since and what he projects to be. And right now, that's looking at a middle to bottom six forward --- with some work to get there.
There's really nothing in that package that screams elite, let alone franchise player. If the roles were reversed, there's no way Montreal makes that trade.