I don't disagree overall here, but I'd point out that Oshie hadn't won dick when the Caps traded for him and had a record of underperforming in the playoffs. I think it's more about your first sentence here than about past history. Oshie came from an environment that for whatever reason wasn't bringing out his best to one that did. Same could be said for any of the fancy free agents or trade targets being discussed.
I think the key with established NHL players, as opposed to prospects, is that in the draft, you generally want BPA regardless of position or need. But with trades and free agents, it's the opposite. You should be trading/signing for FIT. Which is why I said it's about your first line. I hope/expect our scouts and management to identify guys who could fit with the guys we have, provide what's missing, and who, like Oshie, might thrive in our environment. If that's Marner, fine. If it's someone not being drooled over here, also fine.