I like a lot of the things Dubas has done with the team, but the failures of this seasons are 100% on him.
1) Giving up the heart and soul of our team for a flaccid uninspired impending UFA Barrie as the solution to our D is the biggest miss for me.
2) Signing Tavares and not locking up the young core players BEFORE they played a season with him. I remember that summer Marner wanted 'Draisaitl money' and Matthews are more fairly comparable to Eichel. Could have saved +4M there. Now with the team in disarray and no flexibility to improve, Captain Tavares seems more like a burden than a solution @ 11M.
3) Doubling, tripping, quadrupling down on 'small skill'. This team has no weight behind it, not momentum, no meanness. Everything is very cookie-cutter and predictable. Columbus dominated our 'puck possession speed game' because it lacked any heart or intensity. The team is too predictable and fragile. Spezza is the only guy who showed any emotion like he cared and wanted to make a difference. Everyone else was bland and vanilla all series focusing on possession and setting up rushes that CBJ was all too prepared to defend against. We were missing that 'Tom Wilson' factor who can shake up a game that might not be going in your favor.
4) Defense. Seeing Ceci, Marincin, and Holl out there as 3 of our 5 D last night was utterly painful to watch. These guys and Barrie could have been replaced with literally pylons and our fortunes wouldn't have been any different. CBJ running Jones/Werenski they get their two best players out there ever 3rd shift (or more) and these guys lead the defense, they lead the offense, and they make shit happen no matter which forward group is on the ice. For the Leafs they have Rielly who could jump in.... and not much else. The bottom 4 are so vanilla and useless that imo, our bottom 3 forward lines fared significantly worse because they had no one that can help make plays from the back end.
Solutions (???):
I think Pietrangelo is exactly the type of player this team is missing - but acquiring him wont be easy. If we could add him and flip one of Matthews/Marner/Tavares for a package of young (cheap) quality pieces to fill out some holes in the roster, I think there might be room to take a step forward next year. Even after this disappointment, I'd still prefer if there was a way to keep the big boys and compete, but we CANNOT go into next season with Rielly/Muzzin as our two best D surrounded by bargain bin pickups and rookies (Sandin/Liljegren). I also think we need to get a 3rd line center that bring more utility. Kerfoot was uninspiring all season long and never got going on any line. If the 3rd line isn't bringing offense then it better be bringing something else. I'd consider moving all of Kerfoot/Kapanen/Johnson if it brought it some players with more tenacity - even if they're less 'skilled'. I'd also considering moving them for simple draft picks, as our cupboards are again running try of quality talent and we need to free up cap space.
Overall I'd be ok giving Dubas one more year to figure this out because I think he has a better grip on this team then someone new coming in would - but if he cant make significant changes to the make-up of this team then he should go (I'd wait till mid-season to see results).