Part of the problem is they weren't just missing Watt. Kazee should have been getting Maulet's snaps, for example. Or he could have filled in and given them a competent option when Edmunds went down. By the end of that game, the Steelers were missing four of their top six defensive backs (Sutton, Witherspoon, Kazee, and Edmunds). How many teams could thrive in that situation? You are right that nobody should be talking about fatigue this time around. The offense did a much better job with time of possession, even when Trubisky was in there.