I should imagine the 3rd B763 willl be covering the West Canada routes next summer, with the B752 doing Sanfords. I guess any BOS or YHM would have to be on the B738s and B73Gs again.
I must admit that on the telly, the tailskid looked rather close to the RWY, but from that distance with telephoto lenses it's very difficult to judge.
With F5, a B737-800 would only have 20" RWY clearance at the correct rotation rate anyway.