I'd give him a pass because of the achilles' tear. Just a freak injury. Karlsson came back from a worse tear (iirc) and is arguably back to his pre-injury level (slightly worse defensively, slightly more dominant offensively on a worse team). So the pass really only applies to this playoffs, imo. There's still time left for him to come back and go on a tear (no pun intended). I wouldn't mind him not doing so, simply because of the fans around here, but whatever - can't blame him too much as of yet.
Also, if Duncan Keith had been properly punished (instead of getting essentially one meaningful game), the Hawks could very well be eliminated. I really hope the Blues take care of business, but sadly it won't be that big a deal to a team and fanbase that's won it 3 times the past 7 seasons.