You seem to not apply the same level of criticism when considering the Habs as some of the exagerations in your analysis of some of those teams, especially the four I had bolded.
The loss of Drouin will be noticeable, but ultimately negligible. Same for Tatar and Danault, especially when you consider the depth we have in our middle 6 (Toffoli/Anderson/Suzuki/Kotkaniemi/Gallagher/Caufield is our remaining top 6). Armia and Lehkonen are great role players, and surely one or both will be back to fill in our bottom 6. Evans looked more than capable to play 3C this year, and the Habs will be modestly adding 10-12 million in cap space.
KK and Suzuki will absolutely continue to improve. Poehling and Ylonen both look ready to make the jump, and Weber can't get much worse than he has been the last 20 games. Price will be the same goaltender he has been this year and the year before that, we haven't seen any signs of general regression from him. Generally, one would think that the additional ice time for KK/Caufield as opposed to Danault/Tatar COULD lead to a lot more offensive opportunities, at the cost of defensive viability. Again this is all assuming that the Habs make NO changes to their front office or additions via trade/UFA which I would imagine both are possibilities
Toffoli/Suzuki/Gallagher
Anderson/Kotkaniemi/Caufield
Lehkonen/Evans/Armia
Byron/Poehling/Ylonen
Edmundson/Petry
Romanov/Weber
Chiarot/X
Price
Allen
I don't think there is a bad scenario for us in the upcoming expansion draft, but I could be mistaken. I imagine they take Allen, but it would be great to pay them to take Byron or Chiarot instead. Losing Danault basically means our 2/3C slot gets a bit weaker. Losing Tatar AND Drouin means our LW position gets a bit shaky. Ovechkin is probably staying in Washington, but Saad and Landeskog are both pending free agents. Ryan Nugent Hopkins can play LW and C and is available as well. Hamilton, Edler and Martinez are all available this summer as well and would be notable upgrades over what we are icing currently. Lots of big trade opportunities with our gluttony of young ELC talent and draft picks that we could move + whatever we could get for Drouin and Lehkonen ... Montreal is not in a spot where losing two players means we should expect to finish bottom 5.