The west is kinda weak and Kubalik is lighting it up. I think they might be a bit better than you're suggesting TBH. It wouldn't surprise me either way if they make it or not. But they soundly beat the Jets tonight. A team right ahead of them. I doubt they start selling off.
As far as the Ducks go we can't conclusively know, but I would suspect they're closer to a full on rebuild than the Hawks might be. Don't forget the Hawks got a good number of their young talent with the current club. They'll inevitably get better with seasoning and time.
Eh. I doubt they start selling off at this point too, but they've still got a roster that looks like someone trod on it in the middle of a cow field and their underlying metrics point to a tear fueled by unsustainably hot play rather than dominating opponents in a way that can be consistently carried through. I wouldn't be that surprised if they made the playoffs because as you say the West is weak, but I don't think they'll make much noise or that it gets them any closer to winning a Cup. So they should sell, even if they won't.
And, well, we'll see in Anaheim. But closer isn't close enough if it doesn't happen this deadline. The talk is that Kase is available, but not Rakell or Silfverberg or Fowler or anyone like that.
Fwiw though, I'm not sure they're much further off than Chicago. They've got a bunch of young players themselves, got a D corps and goaltender locked in that should be able to get it done (just one more top 4 RD ideally), got one potential big difference maker in Zegras in the pipeline and are trending towards a top 5 pick that'd make a big difference. If they get to pick Byfield or Stutzle this summer, I think all thoughts of selling guys for futures will disappear.