With respect to the Brännström discussion, it was VERY costly to the Isles. It cost them a legit shot at Stone, because Vegas used him as the centerpiece in their trade and Ottawa supposedly wanted Dobson in a similar proposal.
Now Stone preferred to go to Vegas according to reports, but if the Isles had Brännström and Dobson, Vegas would have had to come up with something else entirely.
Maybe Vegas would have still been able to get a deal done, or maybe the Isles could have traded for Stone, won him over and extended him, like they have in other players.
This was not simply a matter of the player didn't pan out as expected, so all is well in the end. It was a lost asset and missed opportunity. A costly one, given the Isles need for a topline winger then and now.