BobbyJet
watch the game, everything else is noise
I think Toews and Kane will be still pretty good as the DMen mature. Seabrook, Keith, and Crow are already on a downtrend.
As for the defensive core ... we're going have to hope that Keith and Joker make a legit 1st pairing. Perhaps Boqvist and Seabrook make a good 3rd pairing. And Forsling and Murphy develop into a passable 2nd pairing.
I believe signing another top 6 forward is the better plan and hope Crow is most of the way back with 2-3 years in the tank.
Another top forward would be good for entertainment purposes in the RS perhaps but not to come anywhere close to being a SC contender.