I think they have improved and will be better, how much better is hard to predict, we'll see.
Just as an example, what I think made Montreal a playoff team was that they had better match-ups, they had players that would give StLouis the possibility to have a player like Laine on the ice and use him on PP, even if he was a disaster 5v5. I think they are worse there this season and it will be very interesting how it affects on Habs overall play. I don't see Habs as improved as many other, just because of that.
I sure think Sabres look more like a Ruff-team now, I am just not convinced that they have the experience and disciplin to play as he wants them to. And talking about Ruff, I expected him to be better to adjust his coaching to the material he had to work with, that was a dissapointment.