True they could have played better, but saying that the Steelers' drives were killed by penalties is false. There was one penalty on the first drive, a holding penalty by Justin Hartwig, and he was holding Stroud. And that drive ended on an INT. Both of those things were caused by the defense. And Big Ben is a big and mobile guy who can, and did on that drive, make things happen on the fly. On the second there was also one penalty, a 5-yard false start (to take it from 3rd and 5 to 3rd and 10), but it wouldn't have prevented Roethlisberger from failing to complete the pass on the 3rd down.
I think that Will James needs to be removed from nickel CB. And I hope that Crowell (and Peters, and Reed, for competition sake) comes back soon.