Thanks for the replies on the subject of Fraser's injury. I know it's late, but I forgot which thread I posted in about it. Mover on the habs board found it.
If the Leafs do keep Fraser, then he could still be as effective. Alexei Emelin has mental plates in his face. (He got beat by Svitov) and it doesn't seem to hold him back now. Granted, he could never fight and that was how he got the plates in the first place, but he still went with Evander Kane, Marcus Foligno and Zdeno Chara.
Then again, Emelin just put his face down and started throwing. There's still that slight chance Fraser could be the same, but I would imagine psychologically he'll be hesitant to. I don't blame him.