I think you are severely underrating this team. In my opinion it's a gold-medal favourite already and that's without any other additions. Yeah, I recognize I'm in the minority probably, but I do believe this team could repeat the performance we saw last year (goes along with me expecting 5-6 additions too). I think the offense will surprise many people, as well as the defensemen. I expect a lot of dirty goals from this team, but goals nontheless. On the ice, I believe they will be pretty much dominating.
I am curious what additions we manage to get, as there is a lot of quality forwards and defensemen, and even goalies, coming up after the 1st round. Good thing might be that the WHC starts week later than last year, and there is like 10 days (at least) between the end of the 1st round and the first game of the worlds. It might be a good thing that Hockey Canada doesn't need to rush things quickly and can give players more time, as their emotions won't be super-high right after elimination.
I am sure that HC would take Doughty like Crosby last year, the real question for me is whether Doughty wants to play in this tournament, hopefully yes, but with World Cup on the line, that is another thing that might play its role.