I think it has more to do with Ramczyk. He's our best run blocker right now so that's who we want to run behind when we need yards (when penning is back that may change or at least balance out). Ruiz is plenty athletic to pull around on power (we ran the QB sweep to the right too. And the Ingram 2pt play).
I think their success in the running game had less to do with our DTs and more with the home crowd + read option threat + solid gameplan. They were definitely winning the matchups up front but they basically ran 2 runs all game (inside and outside zone... You could even call that 1 run). They were just extremely sound.
Again, the saints made mistakes. But the falcons played VERY well. I think the tendency to boil everything down to personnel and play calling issues misses like 90% of what happened. It was really a gameplan that worked from the beginning vs a gameplan that didn't.