It's true that Petersson at his age at 10M for 7 years vs Eichel with his neck at 10M for 5 years is more attractive.
I also have to imagine that our next 4 picks should be trending in the 18-32 range. Now, 1st round picks are still important to sustain success, and there's obviously great players found in the late first all the time but... given our timeline... I'd rather move 4 unknown 1sts than Chytil, Lundkvist, Kravtsov, etc.
So IF we're hell bent on acquiring an elite 1C, I would support going the 4x1st offer sheet route over trading for Captain Jack.