To get Pettersson, you will lose one of Trouba/Kreider plus Strome for nothing in addition to the trade cost of Laf/Kakko, Chytil, Nils/Jones plus picks. Also wouldnt be surprised if Canucks ask for Miller specfically.
How is losing 5 NHL regulars not gutting the team?
Well, because that's not what the cost would be.
Strome is already gone for nothing. We can't afford him next offseason. I mean, I've advocated trading him and was yelled at by the board elders that trying to GET SOMETHING for Strome is a bad idea, that the only possible scenario that DOESN'T destroy the team is to self rent Strome for a playoff push and then let him walk for nothing.
So Strome is already a zero. Acquiring Pettersson doesn't change anything about Strome being gone, so his impending loss is not a factor in the discussion.
My proposed trade was Nils, Kravtsov, a first, and Georgiev, or another small piece, maybe a lesser prospect, maybe a lesser pick, something like that. Given the Eichel return this is a very generous package; it's not unrealistic in the slightest. Maybe Vancouver wants this piece instead of that piece, etc, but that's a four piece package that Vancouver would be lucky to get back.
We are already running Georgiev out of town. Kravtsov has already been run out of town. We lose exactly one NHL piece in this trade in Nils. That's not gutting the team.
Prior to next season we have to move either Kreider or Trouba. My preference would be Trouba. He would be traded for a small package of picks and prospects (ie, not talking first round picks and high end center prospects). Those assets join the system and Trouba is replaced on the roster with an AHL defenseman ie Schneider or Robertson.
Summary - the deal requires from our NHL roster, Nils and Trouba out, Pettersson in. It's a net loss of one player. It's not gutting anything. Oh, and we are overflowing with young defensemen to replace Nils and Trouba, since people have already been advocating we trade Nils for a center to begin with. Jones, Robertson, and Schneider are all almost ready to play.
If the Canucks ask for Miller, I still might make the deal, but then Nils is out of the deal. So same net loss.