This is too low of a total given how the NFL is played today with nearly all of their rules skewed toward helping the offense. 
The buy sign finally could be on for the Browns offense after Baker Mayfield threw two TD passes against the Bills last week. It was his first multiple TD pass performance of the season. Buffalo gives up the third-fewest points in the NFL and also ranks No. 3 in pass defense. Pittsburgh's defense isn't that good and far less intimidating on the road. This marks the Steelers' first road game in five weeks.
Mayfield has a new weapon with Kareem Hunt returning from suspension. Odell Beckham Jr. is way overdue for a big game. The Browns shouldn't be holding anything back with their season on the line. 
Pittsburgh's offense should be better with bell-cow running back James Conner expected to play after being out with a shoulder injury. The Steelers failed to adequately replace Conner when he was out the last two weeks. Mason Rudolph is getting more comfortable each week running Pittsburgh's offense. He should be better set up for favorable pass plays with Conner back in the lineup. The Browns defense is below average especially their run defense, which ranks 27th.
Weather shouldn't be a hindrance either with temperatures in the 30's, clear skies and a 10 mph wind.