It doesn't even matter what the structure is.It’s proving my point. Let’s say Mike Tomlin really did not want to fire Bruce Arians and then the ownership group decides that they want Todd Haley. Well then that’s not really Mike Tomlin making the decision. Then the ownership group decides that Ben should get his guy FiKner the OC job. Again that wouldn’t be Mike Tomlin making the decision so that when the offense is bad it’s really not on him. The same thing would go with the Keith Butler hire. If Keith Butler was told he was the DC in waiting then really the mediocre results and Mike Tomlin wanting to call the place because he doesn’t believe in him as a play caller kinda wouldn’t be his fault. So then it would be a situation. Where has a chef you don’t have control over how the meals come out because somebody else keeps adding ingredients to your food that you don’t want. This is why I want a very clear picture of how their structure is.
Either Tomlin has responsibility for things that coaches of his level of experience and seniority have, and he should be held accountable for the team's consistent mediocrity. (This is almost certainly the case.)
Or, he doesn't have such responsibility, and this means that firing him represents very little downside to Steelers fans because it's someone else who is making all the decisions anyway.