My initial thoughts are that Smith is better than anything they had. He's had success before as an OC, but his struggles in Atlanta can't be ignored. I'll hold off on any judgement either way until I see what it looks like on the field.
For starters, expect the Steelers to be more creative with their usage of their skill position players. Specifically, running backs on early downs. The Falcons came out in 21 personnel (two running backs, one tight end) on 19 percent of first downs in 2023- the Steelers didn't do it once. Atlanta also led the NFL in 22 personnel on first downs, meaning we will see packages where Najee Harris, Jaylen Warren, Pat Freiermuth, and Darnell Washington (or maybe Le'Veon Bell, he said with a sly smile and smug wink) are all on the field at the same time to begin drives and new down sequences fairly often.
In terms of alignment, the Steelers had an issue of lining up in shotgun too much, especially on early downs. That, combined with their offensive tendencies, made it very easy for opposing defenses to predict what was going to happen.
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