I'm with Lapa here--Obviously what Subban did was tremendously dumb, but I guess through my Habs fan glasses I just don't see the "viciousness." It was a stick chop gone wrong. In all my years of watching hockey I don't think I've ever seen a major for slashing called before this, and I always imagined such a thing was less like this and more like the McSorley hit on Brashear. I could see the argument for, say, 2 for slashing and 2 for roughing/interference (since it was away from the puck), but not for an ejection.
I think something that's getting lost here is the fact that Stone was in the crease behind the defense. A defenseman's job is to patrol the crease. This looks to me like PK making an attempt to distract Stone without having to remove himself from the play. Again, it goes without saying that this isn't the right way to go about that, but it's not like he just clubbed him in the back of the head between plays or anything. If he had given him a shoulder check in the same situation, they probably wouldn't have even called interference.
Anyway what's really important here is, it really sucks to hear Stone is actually hurt. This was shaping up to be a great series, and now that potential is more than a bit diminished. Less even matchup, and probably a lot more stupid goonery ******** from both sides to come. And if the Habs win, no matter whether this was intentional or not, the result still gets a little bit of an asterisk, just like when Kreider ran Price in the Conference Finals last year.