I am keeping my fingers crossed : )
IMO, as more and more Cowher players left so did Steeler football. Leadership/intimidation dropped, locker room antics/immaturity/headcases grew. You never knew which team was going to show up under Tomlin. It was very noticeable vs weak teams.
As best and worst case scenarios go, I can see Steelers possibly going 11-5, but I can also see 6-10. I feel their record in 2019 will be closer to the latter.