Yes the committee can consider injuries and suspensions, that is indeed a fact. But the threshold for the level of players they are using is unknown. Personally, I don't believe Syracuse should get benefit of doubt for that game. I don't want the committee guessing on things, because where do you stop? What if Ryan Kelly was hurt against UNC - is that game not considered? Take the W and L and select from there.
It has been reported by some sources (and I have read) that the committee does consider margin of victory (via an adjusted scoring marging metric) in the seeding process only, and in particular to help seed mid major teams. I'm not going to say its 100% fact, but I am not discounting it either.
It is not part of the nitty gritty metrics, and from what I understand is not used to select the teams that get into the tournament.